Questions for AAI

Question paper consists of two sections:

Section I: Non-Technical

Section II: Technical

SECTION I

1. General Knowledge

2. General English (fill in the blanks, error correction, one word is given and u have to check that the

use of given word is correct in the options given or not, and some other questions)

3. Reasoning (coded relations questions and other questions)

4. Questions of intelligence

SECTION II

Subjects in technical section are:

1. Radar

2. Communication

3. Linear / digital device

4. Computer networking

Some technical questions that I remember are:

1. Radar is used for?

2. COHO in MTI Radar uses which freq.?

3. CMRR of amplifier?

4. Binary to hexadecimal conversion?

5. Decimal to hexadecimal conversion?

6. Firewalls are used for?

7. Full form of FPGA?

8. Numerical based on Duty cycle and peak power?

9. If transmitted power is increased by 16 then range is increased by

a) 16, b)8, c)4, d) none of these?

10. AGC is used in which of the stage

a) receiver b) oscillator c) both a and b d) none of these?

11. Delayed AGC is used for which purpose?

12. Question based on the value of mirroring?

13. Question based on RAID.

14. Bridge is used for which of the OSI layer?

15. 5-6 questions are based on various OSI layer and TCP/IP.

16. Which type of feedback is used in amplifier

a) +ve b) -ve c) both a and b d) none of these?

17. Question based on i/p impedance of transmission line of a given wavelength.

18. What are three things for workstations of DNS server?

19. Which of the following is free-running?

a)monostable multivibrator b)astable multivibrator, c)both a and b, d) none of these?

20. 2-3 questions based on voltage and current source.

21. One question of VCO.

These are the TECHNICAL QUESTIONS asked for the Jr.Executive (ATC) held on 20-12-2009.

Syllabus is:

subjects covering General Knowledge, Intelligence, Reasoning, General English, Electronics, Tele

Communication, IT, Electrical, Physics, Mathematics, Computer Science etc.

Duration is TWO hours.

Here are only technical questions asked in the paper, hope its helpful for you...

1. question on Ruth's criterion.

2. charecteristic equation for stable state.

3. common collector amplifier (current, voltage relations...).

4. FET transconductance, Gm is directly proportional to...

5. at 3dB frfequency line, gain reduces to...

6. maximum distortion occurs in which amplifier?

7. class B pushpull amplifier suffers from...

8. Barkhausen's criterion for sustained oscillations..

9. low frequency response of RC coupled amplifier (characteristics)

10. ideal operational trans conductance amplifier (i/p & o/p impedance relations)

11. radiation resistance of folded dipole is ....ohms.

12. IC timer 555, low on pin4(reset), what happens?

13. decimal to binary conversion...

14. question on full adder circuit( no of i/p o/p digits)

15. ckt involving: oscillator -> divider -> schmitt trigger -> flip flop -> o/p= ? ( -> represents followed

by symbol)

16. a ckt: op amp ->diode and capacitor -> o/p; name the ckt?

17. problem on binary adder (6 bit)

18. feedback factor is 0.1, forward gain of system is 10, sensitivity w.r.t f/b element?

19. linux is implemented as?

20. feedback control system characteristics?

21. phased locked loop is used in ?

22. a problem on random variables...

23. freq response char of ideal comm chnl..

24. best error performance for same avg energy per bit (options 16QAM, 16ASK, 16PSK, QPSK)

25. Tx band width od SSB?

26. nyquist interval..

27. r/n b/n spectral density &auto correlation fpor a periodic function.

28. thermal noise power in a conductor is proportional to...

29. numerical on modulation index...

30. question on radar range..

31. question on doppler radar...

32. microwave signal follows earth curvature, phenomenon called as...

33. flex klystron functions as...

34. microwave junction matched at all points is called...'

35. numerical on schmitt trigger ckt operation on a sine wave.

36. question on assembly language (up).

37. assembly language (up).

38. assembly language (up)/(uc).

39. operating system architecture.

40. O.S architecture..

41. protocol to receive mails from server..

42. question on ethernet involving distances (2500 mts).

43. pc to hub distance in 10base T ethernet.

44. ip-sec is an internet security mechanism for ?

Remaining questions were on general knowledge, English, reasoning and etc...

hope this info is useful

ATC - 2009 TEST

Total 100 Qns. Around 50 technical. Only 28 of the technical is added here. Some of the questions

are not complete.

1. Which of the following schemes have the best error performance with the same energy per bit?

1. 16QAM b. 16PSK c. QPSK

2. Same Antenna is used for Tx and Rx. Radar range related to Antenna gain as

1. Directly proportion To G

2. Directly Proportion To square root of G

3. Inversely prop to G

3. Thermal Noise in conductor related to B

1. B 2. 1/B 3. B2 4. Square root of B

4. A control system with feed back gain 0.1 and forward gain 10. What is the sensitivity of the system

w.r.t the feed back system.

5. The value of 'k' for the system to be stable is. (6th degree Characteristic Eqn given)

6. Which of the following system is stable.

1. As2 + Bs +C

2. As2 - Bs +C

3. As4 + B s3 +Cs+D

4. -As2 - Bs -C

7. Linux OS based on which architecture

8. Comparison between Macro and Subroutine

1. Macro better that Sub Rtne with respect to storage time and execution time

2. Vice versa

3. Macro better that Sub Rtne with respect to execution time only

4. Vice versa

9. Which of the following is a privileged instruction?

1. MOV A B

2. INT 21

3. ADD A B

4. IN 08

10. Which of the following instruction is not converted to binary by an Assembly Language Program?

1. TRAP

2. Interrupt

3. Privilige instruction

4. Sorry dont remember

11. In which type of machine can multiple tasks be done

1. Virtual Machine


12. Which of the following has the highest distortion?

1. A 2. B 3. AB 4. C

13. Which of the following distortions occur in Class B push pull amplifier?

1. Harmonic

2. Intermodulation

3. Phase


14. (s)/T(s) of a rotational system (J,B,k regular notaions)

15. Schmitt Trigger with 3V & 1V UTP and LTP respectively. A sinusoidal input with 10V peak is fed as

the input. The output swings between

16. Op-amp circuit given. Identify the circuit (Ans: Peak detector)

17. 6 bit binary ladder with 101001 as input ( 0= 0V, 1 = 10V). Output voltage is ------

18. Doppler Radar of 1125 MHz. Frequency of received echo is 125 MHz. The conclusion is

1. Target also has a radar

2. Target moving away

3. Target approaching

19. Microprocessor cycles between

1. Fetch and Execution operations.

2. Fetch and Halt

20. Modulation index of an FM system with 2.5V, 500 Hz input and 5KHz deviation is

21. Rouths Criterion gives

1. Number of roots on the LHS of S plane

2. Number of roots on the RHS of S plane

22. For the system to be stable, the roots of the characteristic Equation must lie

1. Left side of the S plane

2. Right side of s plane

23. Impulse response h(t) of a system is

1. Inverse Laplace transform of Transfer Function

24. The output of a LTI system with Guassian process input is

1. Gaussian

2. Poisson

25. Spectral Density and Auto-Correlation are

1. Laplace Transform pair

2. Fourier Transform Pair.

26. A flex Klystron is a

1. Microwave amp

2. Microwave Oscillator

3. Both amp and Oscillator

4. High cavity tube

27. S Matrix related question.

28. Block diagram given

Oscillator(1MHz) Divider (/ 10^6) Schmitt Trigger Flip Flop . Output is

1. Pulse Train of width 1 sec


3. Pulse Train of width 0.5 sec

Airport Authority of India conducts a written test for recruitment of many posts. The syllabus

usually has a technical as wells as a non-technical section. Reasoning is one of the major

component of the non-technical exam. Here are some questions that will help you prepare for

the AAI Written Test.

1. In a row of children, Manoj is fifteenth from the left end of the row. If he is shifted towards

the right end of the row by four places, he becomes eighth from the right end. How many

children are there in the row?

(a) 27

(b) 26

(c) 28

(d) 24

2. How many such numerals are there in the number 2576489, which will remain at the same

position when arranged in ascending order from left to right?

(a) One

(b) Two

(c) Three

(d) More than three

3. In a class of 40 children, Manmeets rank is eighth from the top. Vishal is five ranks below Manmeet. What is Vishals rank from the bottom? (a) 27

(b) 29

(c) 28

(d) 26

4. Three of the following four are alike in a certain way. Find the one that does not belong to

this group?

(a) Coriander

(b) Mustard

(c) Cumin

(d) Clove

5. Seed is related to Fruit in the same way as Fruit is related to: (a) Tree

(b) Branch

(c) Flower

(d) Petal

6. Three of the following four are alike in a certain way. Find the one that does not belong to

this group?

(a) Van

(b) Truck

(c) Cargo

(d) Trolley

7. If it is possible to make a three digit number, which is perfect square of a two digit number

from the second, the fourth and the eighth digits of 31792056 using each digit only once,

what is the two digit number? If the perfect square cannot be formed, your answer is N and if more than one such numbers can be formed , your answer is X (a) 14

(b) 16

(c) N

(d) X

8. Pointing to a woman, Suresh said, she is the daughter of my grandfathers only daughter. How is Suresh related to the woman?

(a) Brother

(b) Cousin

(c) Uncle

(d) Cannot be determined

9. Visual is related to Light in the same way as Audio is related to: (a) Voice

(b) Sound

(c) Drama

(d) Noise

10. Jackal is related to Carnivorous in the same way as Goat is related to (a) Omnivorous

(b) Carnivorous

(c) Herbivorous

(d) Multivorous

11. In a certain code DESCRIBE is written as FCJSDTFE. How will CONSIDER be written in that code?

(a) SPEJTOPD

(b) SEFJTOPD

(c) QFETJOPD

(d) QEFJTOPD

12. Four of the following five are alike in a certain way and so form a group. Which is the

one that does not belong to that group?

(a) Shampoo

(b) Talcum Powder

(c) Hair Oil

(d) Cosmetics



(a) 71

(b) 73

(c) 67

(d) 77



(a) Leaf

(b) Flower

(c) Branch

(d) Pollen



(a) Jasmine

(b) Rose

(c) Dahlia

(d) Lotus

16. Radish is related to Root in the same way as Brinjal s related to (a) Fruit

(b) Stem

(c) Flower

(d) Root



(a) Physiology

(b) cardiology

(c) Pathology

(d) Radiology

18. Iron is related to Metal in the same way as Brass is related to (a) Iron

(b) Alloy

(c) Copper

(d) Zinc

19. In a certain code RAID is written as %#$, RIPE is written as %@. How is DEAR

written in that code?

(a) @#%

(b) $@#%

(c) @$#%

(d) $#%

20. If blue is called red, red is called green, green is called black and black is called white,

what is the colour of grass?

(a) red

(b) black

(c) white

(d) green

Directions (21-25): In each of the question below are given three statements followed by two

conclusions numbered I and II. You have to take the three given statements to be true even if

they seem to be at variance with commonly known facts, and then decide which of the given

conclusions logically follows from the given statements disregarding commonly known facts.

Give the answer:

(a) if only conclusion I follows.

(b) if only conclusion II follows.

(c) if either conclusion I or II follows.

(d) if neither conclusion I nor II follows.

(e) if both conclusions I and II follow.

21. Statements:

a. Some pins are forks.

b. All forks are keys.

c. No key is lock.

Conclusions:

I. Some forks are pins.

II. No lock is a pin.

22. Statements:

a. Some shirts are trousers.

b. Some trousers are jackets.

c. All jackets are shawls.

Conclusions:

I. Some shawls are shirts.

II. Some jackets are shirts.

23. Statements:

a. Some leaves are plants.

b. Some plants are trees.

c. Some trees are fruits.

Conclusions:

I. Some fruits are trees.

II. Some trees are plants.

24. Statements:

a. Some rats are dogs.

b. Some dogs are horses.

c. Some horses are camels.

Conclusions:

I. Some horses are rats.

II. Some camels are horses.

25. Statements:

a. Some books are dictionaries.

b. Some dictionaries are files.

c. Some files are papers.

Conclusions:

I. Some papers are files.

II. Some files are books.

Answer Key:

1. b, 2. d, 3. c, 4. b, 5. c

6. c, 7. d, 8. b, 9. b, 10. c

11. a, 12. d, 13. d, 14. d, 15. e

16. a, 17. d, 18. b, 19. d, 20. b

21. c, 22. d, 23. e, 24. b, 25. a

AAI Junior Executive (Electronics) Junior Executive (Electronics) Engineering Degree in Electronics / Tele Communication /

Electrical with specialization in Electronics with Ist class (60%) OR M.Sc Degree or its

equivalent with wireless communication,Electronics, Radio Physics or Radio Engg. as a

special Subject. OR Equivalent with 1st Class (50% for SC/ST).

exam for both posts are of objective type and after written exam there are interview for both

post but there is an additional voice test for the post of Junior Executive ATC.

exam paper of both examination is of two hours and exam paper consists two sections

technical section and non technical section. however there are no fixed number of questions

in exam some times total number of question may be 100 oir some time it may be 150.

technical section contains 55% to 60% (questions from electronics / communication /

microwave / digital electronics / control system / computer / information technology) non

technical questions contains 40% to 40 % questions (from general knowledge, English

language, reasoning and general mathematics).

1. In a communication system, noise is most likely to affect the signal

(a) at the destination

(b) In the channel

(c) in the information source

(d) at the transmitter

2. Indicate the false statement. Fourier analysis shows that the saw tooth

wave consist of

(a) fundamental and subharmonic sine waves

(b) a fundamental sine wave and an infinite number of harmonics

(c) fundamental and harmonic sine waves whose amplitude decreases with

the harmonic number

(d) sinusoidal voltages, some of which are small enough to ignore in

practice

3. One of the following types of noise becomes a great importance at high

frequencies. Is the

(a) random noise

(b) shot noise

(c) impulse noise

(d) transit-time noise

4.Indicate the false statement. The square of the thermal noise voltage

generated by a resistor is proportional to

(a) its temperature

(b) Its resistance

(c) Boltzmanns Constant (d) the bandwidth over which it is measured

5.If the plate supply voltage for a plate modulated class C amplifier is V, the

maximum plate-cathode voltage could be almost as high as

(a)4v

(b)3v

(c)2v

(d)1v

6. Which one will be stable if characteristics equation is

(a) AS^2+BS+C

(b) AS^2-BS-C

(c) AS^4+BS^2+CS+D

(d) -AS^2+BS-C

7.When microwave follows curvature of the earth, this I know as

(a) fading

(b) Ducting

(c) troposphere scatter

(d) ionosphere reflection

8. Broadband long distance communications are originally made possible by

the advent of

(a) telegraph cables

(b) repeater amplifiers

(c) HF radio

(d) Geostationary satellites

9. Switching systems

(a) Improve the efficiency of data transfer

(b) are not used in data system

(c) require additional lines

(d) are limited to small data networks

10. Basic group B

(a) occupies the frequency range from 60 to 108 k hz

(b) consist of erect channels only

(c) is formed at the group translating equipment

(d) consist of five super group

11. In differential amplifiers, the common emitter current is made constant

(a) To make Ad (differential gain) very small

(b) To make Ac (common mode gain) very small

(c) To make the amplifier symmetrical

(d) To keep CMRR constant

12. Given BCD number 1001 0011, its decimal equivalent is

(a) 147

(b) 143

(c) 93

(d) 39

13. An amplifier has voltage gain of 50. this gain in db will be

(a) 17 db

(b) 31 db

(c) 34 db

(d) 68 db

14. In a E plane Tee, the output of the two rams are

(a) 180 degree out of phase

(b) In the same phase

(c) 90 degree out of phase

(d) none of these

15. waveguide are generally made of

(a) Aluminium

(b) Bronze

(c) Both (a) and (b)

(d) none of these

Answers 1.(b) 2.(a) 3.(d) 4.(a) 5.(a) 6.(a) 7.(b) 8.(b) 9.(a) 10.(a) 11.(b) 12.(c) 13.(c) 14.(a) 15.(c)

The AAI written Question paper dwells of two sections first: Non Technical, second Technical,

The first section has 4 types of questions

1. GK (General Knowledge questions)

2. General EnglishThe general english test questions are fill in the blanks type and errors

3. Reasoning

4. Other (puzzles, etc.)

Section 2:

The subjects for the section 2 are Microwave & Radar, Communication, Linear Digital Devices, Networking (CN)

Important sample technical questions for AAI Placement Test:

Electronics (engineering), Communication, Electrical, B.Tech

What is a radar used for?

Which frequency do we use in MTI radar (COHO)?

What do you mean by CMRR of an amplifier?

Conversion related questions (binary to hexadecimal, decimal to hex)

Numericals (peak power)

What do you mean by FPGA?

In which OSI layer do we use the bridge?

Various other questions based on OSI Layer (Computer networking questions), TCP/IP

protocols (multiple choice type)

Why do we use a delayed AGC?

What is VCO?

Why do we use firewalls?

What is mirroring, RAID, etc.

Relation between transmitted power & range If we increase power by 16, range increases by?

Where do we use an AGC in a circuit?

The paper consists of General Aptitude,Reasoning, GK,and techincal questions.

TECHNICAL:

1) The radiation pattern of yagiuda antenna? a)omnidirectional b)broadside c)end side

2)Function of synchro? a)transducer b) modulator c)demodulator d)encoder & decoder

3)Voltage feedback gives?

4)bcd value of 001100100001?

5)questions on micro controller pins?

6)simple questions on logic gates?

7)simple problems on rlc networks?

8)function of RAM?

9)hall effect is used to measure?

10)in RC phaseshift oscillator a condition to get oscillations is hfe>= 4K+23+29/K

11)directivity of half wave dipole is.1.64..

12)READY signal is used in MP becoz of slow devices connected..

13)TRAP is non maskable interrupt..

14)value of threshold voltage?

15)function of magnetron?

16) combinational ckt means a)with memory b)with out memory c)constucted with logic

gates d) both b & c

17) 2 qs on nmos transistor.

18) 1 q on wheatstone bridge, 1 q on kcl, kvl

19)what is rom ? a) temporary storage b)permanent storage c)..d)

20) 1 q on rat race junction.

21) 1 q on txn line short ckted condition.

22)1 q on sqrt(81max).

23) take a 4 digit binary noi.e A.and then what is A+Abar= a)1101 b)1011 c)1111 d)0000

24) 1 q on op amp prob , 1 q on slew rate

25) 1 q on which filter is used for extracting sine signalof 1mhz

26) if there are 8 rc filter sections what is the individual phase shift? a)180 b)45 c)22.5

GK

1) RIGHT TO EXPRESS COMES UNDER WHICH ARTICLE?

2) QUESTION ON COUNTRY CURRENCy?

3) QUESTION ON MULTI PURPOSE DAMS?

4)what are boxing rules called?

5)2 qs on spellings. 6)2 qs on correction of sentences.

1. Which of the following schemes have the best error performance with the same

energy per bit? 1. 16QAM b. 16PSK c. QPSK

2. Same Antenna is used for Tx and Rx. Radar range related to Antenna gain as

1. Directly prop. To G

2. Direc. Prop. To sq. root of G

3. Inversely prop to G

3. Thermal Noise in conductor related to B

1. B

2. 1/B

3. B2

4. Square root of B

4. A control system with feed back gain 0.1 and forward gain 10. What is the sensitivity of

the system w.r.t the feed back system.

5. The value of k for the system to be stable is. ( 6th degree Characteristic Eqn given)

6. Which of the following system is stable.

1. As2 + Bs +C

2. As2 Bs +C 3. As4 + B s3 +Cs+D

4. -As2 Bs -C

7. Linux OS based on which architecture

8. Comparison betweeb Macro and Subroutine

1. Macro better that Sub Rtne with respect to storage time and execution time

2. Vice versa

3. Macro better that Sub Rtne with respect to execution time only

4. Vice versa

9. Which of the following is a privileged instruction?

1. MOV A B

2. INT 21

3. ADD A B

4. IN 08

10. Which of the following instruction is not converted to binary by an Assebly Language

Program?

1. TRAP

2. Interrupt

3. Privilige instruction


11. In which type of machine can multiple tasks be done

1. Virtual Machine


12. Which of the following has the highest distortion?

1. A

2. B

3. AB

4. C

13. Which of the following distortions occur in Class B push pull amplifier?

1. Harmonic

2. Intermodulation

3. Phase


14. ?(s)/T(s) of a rotational system (J,B,k regular notaions)

15. Schmitt Trigger with 3V & 1V UTP and LTP respectively. A sinusoidal input with 10V

peak is fed as the input. The output swings between

16. Op-amp circuit given. Identify the circuit (Ans: Peak detector)

17. 6 bit binary ladder with 101001 as input ( 0= 0V , 1 = 10V). Output voltage is

18. Doppler Radar of 1125 MHz. Frequency of received echo is 125 MHz. The conclusion is

1. Target also has a radar

2. Target moving away

3. Target approaching

19. Microprocessor cycles between

1. Fetch and Execution operations.

2. Fetch and Halt

20. Modulation index of an FM system with 2.5V, 500 Hz input and 5KHz deviation is

21. Rouths Criterion gives 1. Number of roots on the LHS of S plane

2. Number of roots on the RHS of S plane

22. For the system to be stable, the roots of the characteristic Equation must lie

1. Left side of the S plane

2. Right side of s plane

23. Impulse response h(t) of a system is

1. Inverse Laplace transform of Transfer Function

24. The output of a LTI system with Guassian process input is

1. Gaussian

2. Poisson

25. Spectral Density and Auto-Correlation are

1. Laplace Transform pair

2. Fourier Transform Pair.

26. A flex Klystron is a

1. Microwave amp

2. Microwave Oscillator

3. Both amp and Oscillator

4. High cavity tube

27. S Matrix related question.

28. Block diagram given

Oscillator(1MHz) Divider (/ 10^6) Schmitt Trigger Flip Flop . Output is



3. Pulse Train of width 0.5 sec

AAI Model Question Paper Aptitude Questions:

(1) 3.2 x 6.8 x 9.5 = ? (a) 207.62 (b) 202.67 (c) 206.27 (d) 207.72 (e) None of these (2) 153 x 93- 15552= ? (a) 41250 (b) 43250 (c) 42350 (d) 44250 (e) None of these (3) v? + 17 = v=961 (a) 169 (b) 256 (c) 225 (d) 196 (e) None of these (4) 1236 0.8 =? (a) 25.625 (b) 23.545 (c) 27.455 (d) 21.365 (e) None of these (5) The simple interest accrued on an amount of Rs. 84000 at the end of three years is Rs. 30240.What would be the compound interest accrued on the same at the same rate in the same period? (a) Rs. 30013.95 (b) Rs. 31013.95 (c) Rs.32013.95 (d) Rs.33013.95 (e) None of these (6) Veena obtained an amount of Rs. 8376 as simple interest on a certain amount at 8% p.a. after 6 years. What is the amount invested by Veena? (a) Rs. 17180 (b) Rs. 18110 (c) Rs.16660 (d) Rs.17450 (e) None of these (7) What would be the compound interest accrued on an amount of Rs. 8000 at the rate of 15% p.a. in three years? (a) Rs. 4283 (b) Rs. 4051 (c) Rs.4167 (d) Rs.4325 (e) None of these

(8) What will be the difference between the compound interest and simple interest at the rate of 5% p.a. on an amount of Rs. 4000 at the end of two years? (a) Rs. 10 (b) Rs.20 (c) Rs.30 (d) Data inadequate (e) None of these (9) If the compound interest accrued on an amount of Rs. 14500 in two year is 4676.25, what is the rate of interest % p.a.? (a) Rs. 684 (b) Rs. 689 (c) Rs.645 (d) Rs.698 (e) None of these (10). Out of 55 eggs 5 are defective. what is % of defective eggs Ans:9/11% (11). 1/8 is divided by s , if s is increased by 2 times, what is the result. Ans: increases two times (12). For each hour an watch is going slow by 30 seconds. Now time is 8a.m.What will be the actual time at 8p.m. Ans: 7:54. (13). If a person walks at 4/5th of his usual spee he reaches 40min late. If he walks at his usual speed how much time does he travels. Ans:160min or 2hr 40min (14). In a class 80% have passed english,70% passed Hindi 10% did not passed either. If 144 students passed both. What is the total strength of the class. Ans: 240. (15). Find the least number when divided by 7 gives the reminder 6, when divided by 6 gives reminder 5, when divided by 5 gives reminder 4 and so on. Ans: 419 (16). If a man stands in front of sun what is the first letter of the direction which is left to him: Ans: North(N) (17).Two series are 16,21,26. and 17,21,25..What is the sum of first hundred common numbers (a) 101100 (b) 110100 (c) 101110 (d) 110101 Ans. (a) (18). There are two sections in a question paper each contain five questions. A students has to answer 6 questions. Maximum no. of questions that can be answered from any section is 4. How many ways he can attempt the paper? (a) 50 (b) 100 (c) 120

(d) 200 Ans. (d) (19). a and b are two numbers selected randomly from 1,2,3. 25 what is the probability of a and b are not equal. (a) 1/25 (b) 24/25 (c) 13/25 (d) 2/25 Ans. (b) (20). The sum of the series 1 + 1(1+1/n) + 3(1+1/n)2 + .. is equal to? Ans. n2 (21). Two circles of different radii intersects each other what is the maximum no of intersections (a) 0 (b) 1 (c) 2 (d) 3 Ans. (c) (22). How long will a train 100m long travelling at 72kmph take to overtake another train 200m long travelling at 54kmph (a) 70sec (b) 1min (c) 1 min 15 sec (d) 55 sec Ans. (b) (23). What is the product of the irrational roots of the equation (2x-1)(2x-3)(2x-5)(2x-7)=9? (a) 3/2 (b) 4 (c) 3 (d) 3/4 Ans. (a) (24). Worker W produces n units in 5 hours. Workers V and W, workers independently but at the same time, produce n units in 2 hours. how long would it take V alone to produce n units? a) 1 hr 26 min b) 1 hr 53 min c) 2 hr 30 min d) 3 hr 30 min e) 3 hr 20 min Ans: e (25). 49.The sum of 7 consecutive odd numbers in terms with 27 as fourth number Ans:189 (26). It takes 30 days to fill a laboratory dish with bacteria. If the size of the bacteria doubles each day, how long did it take for the bacteria to fill one half of dish? (27). If the area of a square increases by 69%, then the side of the square increased by Ans: 30% Technical Questions :

1. Which of the following schemes have the best error performance with the same energy per bit? 1. 16QAM b. 16PSK c. QPSK 2. Same Antenna is used for Tx and Rx. Radar range related to Antenna gain as 1. Directly prop. To G 2. Direc. Prop. To sq. root of G 3. Inversely prop to G 3. Thermal Noise in conductor related to B 1. B 2. 1/B 3. B2 4. Square root of B 4. A control system with feed back gain 0.1 and forward gain 10. What is the sensitivity of the system w.r.t the feed back system ? 5. Which of the following system is stable. 1. As2 + Bs +C 2. As2 Bs +C 3. As4 + B s3 +Cs+D 4. -As2 Bs -C 6. Linux OS based on which architecture ? 7. Comparison between Macro and Subroutine 1. Macro better that Sub Rtne with respect to storage time and execution time 2. Vice versa 3. Macro better that Sub Rtne with respect to execution time only 4. Vice versa 8. Which of the following is a privileged instruction? 1. MOV A B 2. INT 21 3. ADD A B 4. IN 08 9. Which of the following instruction is not converted to binary by an Assebly Language Program? 1. TRAP 2. Interrupt 3. Privilige instruction 4. Sorry dont remember 10. In which type of machine can multiple tasks be done 1. Virtual Machine 2. Sorry dont remember 11. Which of the following has the highest distortion? 1. A 2. B 3. AB 4. C

12. Which of the following distortions occur in Class B push pull amplifier? 1. Harmonic 2. Intermodulation 3. Phase 4. Sorry dont remember 13. ?(s)/T(s) of a rotational system (J,B,k regular notaions) 14. Schmitt Trigger with 3V & 1V UTP and LTP respectively. A sinusoidal input with 10V peak is fed as the input. The output swings between ? 15. Op-amp circuit given. Identify the circuit (Ans: Peak detector) 16. 6 bit binary ladder with 101001 as input ( 0= 0V , 1 = 10V). Output voltage is 17. Doppler Radar of 1125 MHz. Frequency of received echo is 125 MHz. The conclusion is 1. Target also has a radar 2. Target moving away 3. Target approaching 18. Microprocessor cycles between 1. Fetch and Execution operations. 2. Fetch and Halt 19. Modulation index of an FM system with 2.5V, 500 Hz input and 5KHz deviation is 20. Rouths Criterion gives 1. Number of roots on the LHS of S plane 2. Number of roots on the RHS of S plane 21. For the system to be stable, the roots of the characteristic Equation must lie 1. Left side of the S plane 2. Right side of s plane 22. Impulse response h(t) of a system is 1. Inverse Laplace transform of Transfer Function 23. The output of a LTI system with Guassian process input is 1. Gaussian 2. Poisson 24. Spectral Density and Auto-Correlation are 1. Laplace Transform pair 2. Fourier Transform Pair. 25. A flex Klystron is a 1. Microwave amp 2. Microwave Oscillator 3. Both amp and Oscillator 4. High cavity tube

AAI Solved Model Question Paper

Aptitude Questions:

1. If the following numbers are rewritten by interchanging the digits in tens place and hundreds place and then arranging them in the descending order. What will be the second digit of the newly formed fifth number from your right ? 479, 736, 895, 978, 389, 675 (A) 3 (B) 4 (C) 5 (D) 6 2. P is 60 m South-East of Q. R is 60 m North-East of Q. Then R is in which direction of P ? (A) North (B) North-East (C) South (D) South-East Directions(Q. 35) Read the following information for answering the questions that follow On a playing ground A, B, C, D and E are standing as described below facing the North. (i) B is 50 metres to the right of D. (ii) A is 60 metres to the South of B (iii) C is 40 metres to the West of D. (iv) E is 80 metres to the North of A. 3. If a boy walks from C, meets D followed by B, A and then E, how many metres has he walked if he has travelled the straight distance all through ? (A) 120 (B) 150 (C) 170 (D) 230 4. What is the minimum distance (in metre approximately) between C and E ? (A) 53 (B) 78 (C) 92 (D) 120 5. Who is to the South-East of the person who is to the left of D ? (A) A (B) B (C) C (D) E 6. A man was walking in the evening just before the sun set. His wife said that, his shadow fell on his right. If the wife was walking in the opposite direction of the man, then which direction the wife was facing ? (A) North (B) West (C) South (D) East Directions(Q. 711) In each of the following questions choose the set of numbers from the four alternative sets that is similar to the given set. 7. Given set : (4, 9, 18) (A) (8, 14, 22) (B) (10, 15, 25)

(C) (6, 12, 23) (D) (12, 17, 26) 8. Given set : (10, 14, 17) (A) (4, 11, 14) (B) (9, 12, 15) (C) (8, 13, 18) (D) (6, 9, 12) 9. Given set : (7, 27, 55) (A) (21, 35, 52) (B) (18, 42, 65) (C) (16, 40, 72) (D) (13, 30, 58) 10. Given set : (39, 28, 19) (A) (84, 67, 52) (B) (52, 25, 17) (C) (70, 49, 36) (D) (65, 45, 21) 11. Given set : (246, 257, 358) (A) (233, 343, 345) (B) (273, 365, 367) (C) (143, 226, 237) (D) (145, 235, 325) Directions(Q. 1216) Each question contains six or seven statements followed by four sets of combinations of three. Choose the set in which the statements are logically related. 12. (1) All books are having pages. (2) All kings are having pages. (3) All kings are books. (4) Some heavy things are having pages. (5) Some heavy things are books. (6) Some books are heavy. (7) Some heavy things are having pages. (A) 1, 2, 3 (B) 6, 1, 4 (C) 4, 6, 1 (D) 1, 5, 7 13. (1) No athletes are vegetarians. (2) All cricket players are athletes. (3) Some athletes play cricket. (4) Some cricket players are vegetarians. (5) No cricket player is a vegetarian. (6) All athletes are vegetarians. (A) 1, 2, 5 (B) 3, 4, 1 (C) 1, 5, 2 (D) 2, 5, 6 14. (1) All grandmothers cook well. (2) No man is a grandmother. (3) Some men do not cook well. (4) All those who cook well are men. (5) No one who cooks well is a man.

(6) All those who cook well are grandmothers. (7) Some men are not grandmothers. (A) 2, 6, 5 (B) 2, 5, 6 (C) 1, 4, 2 (D) 6, 4, 7 15. (1) Looting is a crime. (2) Some crooked people are criminals. (3) All those involved in looting are criminals. (4) Some crooked people are involved in looting. (5) All criminals are looked down in society. (6) Some crooked people are not criminals. (A) 1, 4, 6 (B) 3, 6, 2 (C) 1, 2, 6 (D) 3, 4, 2 16. (1) Some women are those who are successful in life. (2) Some men are those who have patience. (3) No man is a woman. (4) All those who have patience are successful in life. (5) Some who are successful in life are men. (6) Some men are not those are successful in life. (A) 1, 3, 6 (B) 4, 2, 6 (C) 1, 5, 3 (D) 2, 4, 5 Directions(Q. 1721) Each of the questions below consists of a question and two statements numbered (I) and (II). You have to decide whether the data provided in the statements are sufficient to answer the question. Give answers (A) If the data in statement (I) alone are sufficient to answer the question, while the data in statement (II) alone are not sufficient to answer the question; (B) If the data in statement (II) alone are sufficient to answer the question, while the data in statement (I) alone are not sufficient to answer the questions; (C) If the data even in both statements (I) and (II) together are not sufficient to answer the question; (D) If the data in both statement (I) and (II) together are necessary to answer the question. 17. In which direction is Mahatmajis statue facing ? I. The statue is towards the northern end of the city. II. The statues shadow falls towards East at 5 Oclock in the evening. Ans : (C) 18. What is the total number of pupils in the final year class ? I. The number of boys in the final year class is twice as much as the number of girls in that class. II. The sum of the ages of all the pupils in the class is 399 years and their average age is 19 years. Ans : (B) 19. Who is the tallest among A, B, C and D ? I. A is taller than C. II. B is taller than C and D. Ans : (C) 20. How many Sundays are there in a particular month of a particular year ?

I. The month begins on Monday. II. The month ends on Wednesday. Ans : (D) 21. What is the total number of pages in this book ? I. I counted 132 pages from the beginning of this book. II. My wife counted 138 pages starting from the end of the same book. Ans : (C) Directions(Q. 2226) In each of the questions given below, there is a statement followed by three assumptions numbered I, II and III. An assumption is something supposed or taken for granted. You have to consider the statement and assumptions and then decide, which of the assumption(s) is/are implicit in the statement. 22. Statement : During pre-harvest kharif seasons, the government has decided to release vast quantity of foodgrains from FCI. Assumptions :I. There may be a shortage of foodgrains in the market during this season. II. The kharif crop may be able to replenish the stock of FCI. III. There may be a demand from the farmers to procure kharif crop immediately after harvest. (A) None is implicit (B) Only I and II are implicit (C) Only II and III are implicit (D) All are implicit 23. Statement : To improve the employment situation in India, there is a need to recast the present educational system towards implementation of scientific discoveries in daily life. Assumptions :I. The students after completing such education may be able to earn their livelihood. II. This may bring meaning of education in the minds of the youth. III. The state may earn more revenue as more and more people will engage themselves in self employment. (A) Only I and II are implicit (B) Only III is implicit (C) Only I and III are implicit (D) None is implicit 24. Statement : To increase profit, the oil exporting countries decided to reduce the production of crude by 5 million barrels per day. Assumptions :I. The price of crude may increase due to less production. II. The demand of crude may remain same in future. III. Other countries may continue buying crude from these countries. (A) All are implicit (B) Only II and III are implicit (C) Only I and II are implicit (D) None is implicit 25. Statement : We do not want you to see our product on newspaper, visit our shop to get a full view. an advertisement. Assumptions :I. People generally decide to purchase any product after seeing the name in the advertisement. II. Uncommon appeal may attract the customers. III. People may come to see the product. (A) All are implicit (B) None is implicit (C) Only II and III are implicit (D) Only I and II are implicit

26. Statement : The Reserve Bank of India has directed the banks to refuse fresh loans to major defaulters. Assumptions :I. The banks may still give loans to the defaulters. II. The defaulters may repay the earlier loan to get fresh loan. III. The banks may recover the bad loans through such harsh measures. (A) All are implicit (B) None is implicit (C) Both II and III are implicit (D) Both I and II are implicit Directions(Q. 2731) In questions given below, statements 1 and 2 are followed by conclusions I and II. Taking the statements to be right although they may seem at variance with commonly accepted facts, mark your answers as under (A) If only conclusion I follows. (B) If only conclusion II follows. (C) If both I and II follows. (D) Neither I nor II follows. 27. Statements :1. All hands are machines. 2. All machines are wheels. Conclusions :I. All wheels are hands. II. All hands are wheels. Ans : (B) 28. Statements :1. Some buds are leaves. 2. Some leaves are red. Conclusions : I. Some buds are red. II. Some leaves are not buds. Ans : (B) 29. Statements : 1. Some stones are shells. 2. All shells are pearls. Conclusions :I. Some stones are pearls. II. All pearls are shells. Ans : (A) 30. Statements :1. Brown is red and blue is green. 2. Green is pink and yellow is red. Conclusions : I. Yellow is brown. II. Pink is blue. Ans : (C) 31. Statements : 1. Merchants who do not own cars do not have bicycles either. 2. Those who do not have bicycles have tricycles. Conclusions :I. Some merchants have only tricycles. II. No one has both, the car and the tricycles. Ans : (D) Directions(Q. 3236) A number arrangement machine, when given a particular input, rearranges it following a particular rule. The following is the illustration of the input and the stages of arrangement. Input : 245, 316, 436, 519, 868, 710, 689 Step I : 710, 316, 436, 519, 868, 245, 689

Step II : 710, 316, 245, 519, 868, 436, 689 Step III : 710, 316, 245, 436, 868, 519, 689 Step IV : 710, 316, 245, 436, 519, 868, 689 Step IV is the last step of input. 32. If 655, 436, 764, 799, 977, 572, 333 is the input which of the following steps will be 333, 436, 572, 655, 977, 764, 799 ? (A) II (B) III (C) IV (D) I 33. How many steps will be required to get the final output from the following input ? Input : 544, 653, 325, 688, 461, 231, 857 (A) 5 (B) 4 (C) 3 (D) 6 34. For the given input, which of the following will be third step ? Input : 236, 522, 824, 765, 622, 463, 358 (A) 522, 236, 765, 824, 622, 463, 358 (B) 522, 622, 236, 824, 765, 463, 358 (C) 522, 622, 236, 765, 824, 463, 358 (D) 522, 622, 236, 463, 824, 765, 358 35. If following is the second step for an input, what will be the fourth step ? Step II : 620, 415, 344, 537, 787, 634, 977 (A) 620, 415, 344, 537, 634, 787, 977 (B) 620, 415, 344, 634, 537, 787, 977 (C) 620, 415, 344, 634, 787, 537, 977 (D) Cant be determined 36. Which of the following is the last step for the following input ? Input : 473, 442, 735, 542, 367, 234, 549 (A) 234, 442, 542, 473, 735, 367, 549 (B) 234, 442, 542, 735, 473, 367, 549 (C) 234, 442, 542, 473, 367, 735, 549 (D) 234, 442, 542, 735, 367, 473, 549 Directions(Q. 3741) Read the following information carefully and answer the questions given below it (1) There is a group of six persons A, B, C, D, E and F in a family. They are Psychologist, Manager, Lawyer, Jeweller, Doctor and Engineer. (2) The doctor is the grandfather of F, who is a Psychologist. (3) The Manager D is married to A. (4) C, the Jeweller, is married to the Lawyer. (5) B is the mother of F and E. (6) There are two married couples in the family. (7) The Psychologist is a female while Engineer is a male. 37. What is the profession of E ? (A) Doctor (B) Engineer (C) Manager (D) Psychologist

38. How is A related to E ? (A) Brother (B) Uncle (C) Father (D) Grandfather 39. How many male numbers are there in the family ? (A) One (B) Three (C) Four (D) Two 40. What is the profession of A ? (A) Doctor (B) Lawyer (C) Jeweller (D) Manager 41. Which of the following is one of the pairs of couples in the family ? (A) AB (B) AC (C) AD (D) AE 42. Three of the following four are alike in a certain way and so form a group. Which is the one that does not belong to that group ? (A) Papaya (B) Mango (C) Jackfruit (D) Watermelon 43. Three of the following four are similar in relation to their positions in the English alphabet and hence form a group. Which one does not belong to that group ? (A) SPEAK : PZVKH (B) HUSKY : BPGFS (C) BRAIN : MRZIY (D) BREAK : PZVIY 44. Three of the following four groups of letters are alike in some way while one is different. Find out which one is different ? (A) DJWR (B) EKXR (C) KQDX (D) AGTN 45. Four groups of letters are given below. Three of them are alike in a certain way while one is different. Choose the odd one. (A) GWOURV (B) LZKMSU (C) SFXPMG (D) JOEHNP 46. Four pairs of words are given below out of which the words in all pairs except one, bear a certain common relationship. Choose the pair in which the words are differently related. (A) Watt : Power (B) Ampere : Current (C) Pascal : Pressure

(D) Radian : Degree 47. Number of letters skipped in between adjacent letters of the series starting from behind are increased by one. Which of the following series observes this rule ? (A) ONLKI (B) OMKIG (C) OMJFA (D) OIGDC 48. If the letters of the word PROTECTION which are at odd numbered position in the English alphabet are picked up and are arranged in alphabetical order from left and if they are now substituted by Z, Y, X and so on, beginning from left which letter will get substituted by X ? (A) E (B) O (C) T (D) I 49. How many pairs of letters are there in the word OPERATION in which the difference between them is the same as in the English alphabet ? (A) 3 (B) 5 (C) 7 (D) 9 50. Arrange the given words in order in which they occur in the dictionary and then choose the correct sequence. (1) Dissipate (2) Dissuade (3) Disseminate (4) Distract (5) Dissociate (6) Dissect (A) 6, 3, 1, 5, 2, 4 (B) 1, 6, 3, 2, 4, 5 (C) 3, 6, 1, 2, 5, 4 (D) 4, 6, 3, 1, 5, 2 51. The letters skipped in between the adjacent letters in the series are followed by equal space. Which of the following series observes this rule ? (A) SUXADF (B) RVZDFG (C) HKNGSW (D) RVZDHL Directions(Q. 5256) In a certain code, letters of English alphabet are coded as given for some words. The numeric code for each letter is given in bracket under coded form and corresponds to the letter in the word in the same serial order, study the coded forms of the given words and find out the rules for their classification. Applying those rules find out the code for the words given in capital letters in the questions that follow Word Codes FormATE (0) (5) (0) NONE (5) (25) (5) (25) UNIT (30) (5) (30) (5) PIN (5) (10) (5) PAGE (5) (25) (5) (25) OPEN (30) (5) (30) (5) ONE (0) (5) (0) CUT (5) (10) (5)

SEAT (5) (15) (15) (5) DEEP (5) (20) (20) (5) 52. VINA (A) (5) (0) (5) (15) (B) (5) (25) (5) (25) (C) (5) (30) (5) (30) (D) (5) (10) (5) (30) 53. AGE (A) (0) (15) (0) (B) (15) (15) (15) (C) (0) (10) (10) (D) (0) (5) (0) 54. PEAR (A) (5) (15) (15) (5) (B) (5) (25) (5) (25) (C) (5) (10) (5) (10) (D) (5) (30) (5) (30) 55. TIN (A) (0) (5) (0) (B) (5) (0) (5) (C) (0) (10) (0) (D) (5) (10) (5) 56. UNIT (A) (5) (30) (5) (30) (B) (5) (10) (30) (10) (C) (30) (5) (30) (5) (D) (15) (10) (10) (15) 57. If the first and second digits in the squence 7 9 8 4 5 3 6 7 8 3 4 5 are interchanged, also the third and fourth digits, the fifth and sixth digits and so on which digit would be the sixth counting from your right ? (A) 5 (B) 6 (C) 7 (D) 8 58. The letter I, J, K, L, M, N, O, P, Q, R, S, T in their order are substituted by twelve numbers but not in that oder. 3 is assigned to R. The difference between R and M is 7. The difference between K and M is 2. What number is assigned to K ? (A) 8 (B) 12 (C) 7 (D) 11 59. Below are given six three-character numbers. The characters comprise of digits and letters. The letter stands for one less than its serial order in the English alphabet. What will be the middle character of the 3rd number when the numbers are arranged in the decending order ? 8G6, 3DJ, F4C, 7HB, 4E6, B8I (A) 7 (B) 8 (C) 6 (D) 4

60. Which of the following will be the third digit of the fourth number after the following numbers are arranged in descending order after reversing the positions of the digits within each number ? 645, 869, 458, 347, 981, 792 (A) 4 (B) 6 (C) 8 (D) 9 General Knowledge : 1. Which of the following stars lies nearest to our solar system ? (A) Barnards Star (B) Sirius A (C) Alpha Centauri A (D) Proxima Centauri 2. Of the total water on the earth, fresh water reserves constitute approximately (A) 58% (B) 45% (C) 259% (D) 12% 3. The term Bishop in sports is related to (A) Chess (B) Hockey (C) Badminton (D) Bridge 4. Yakshagan is the famous dance form of the State of (A) Orissa (B) Andhra Pradesh (C) Tamil Nadu (D) Karnataka 5. Balance of Payments means (A) Difference between export and imports (B) Balance to be paid to the exporters (C) Balance to be paid to the industrialists (D) Balance coming in allocation of funds for States 6. A light year is equivalent to about (A) 365 days (B) Six million miles (C) Six billion miles (D) Six trillion miles 7. Denmark, Iceland, Norway, Sweden and Finland are together called (A) Slovakia (B) Scandinavia (C) Netherlands (D) Australasia 8. The device used for locating submerged objects under sea is (A) Sonar (B) Radar (C) Laser

(D) Maser 9. Which article of the Constitution provides the Parliament the power to ammend Constitution ? (A) 376 (B) 370 (C) 368 (D) 390 10. What is the name of the first successfully cloned deer ? (A) Dawn (B) Deluxe (C) Demor (D) Dewey 11. The idea of motion pictures was propounded by (A) N. R. Finsen (B) T. A. Edison (C) J. L. Baird (D) Berliner 12. In Greek mythology, Apollo is the god of which of the following ? (A) Love (B) Peace (C) Prophecy (D) Medicine 13. NASAs new space telescope is (A) Wise (B) Rise (C) Barack (D) Telle 14. Bull fighting is the national game of (A) Italy (B) Poland (C) Spain (D) Sudan 15. In a rare recognition, the Government of Mauritius decides to introduce a book written by Uttarakhand Chief Minister Ramesh Pokhriyal Nishank in the School Syllabus of the island nation, what is the name of the book ? (A) Sound of Hills (B) Sparsh Ganga (C) Heaven (D) Amrit 16. Who has been selected for the Niwano Peace Prize, 2010 for her contribution to the uplift of poor women in India ? (A) Ela Bhatt (B) Jhumpa Lahiri (C) Punam Suri (D) Mandakni Apte 17. On which of the following dates in 2010 did the safeguard agreement with regard to civilian nuclear facilities between India and the International Atomic Energy Agency (IAEA) come into force ? (A) February 28

(B) February 21 (C) February 11 (D) February 4 18. The tax which the kings used to collect from the people in the Vedic period was called (A) Bali (B) Vidatha (C) Varman (D) Kara 19. The cells which are responsible for the production of antibodies are (A) Red blood cells (B) Neutrophils (C) Lymphocytes (D) Platelets 20. Correct expansion of the term http in Internet address is (A) Hybrid text transfer protocol (B) Hyper text transfer protocol (C) Higher transfer text protocol (D) Higher text transfer protocol

AAI Model Question Paper

Reasoning :

1. Six members of a family are travelling these are a,b,c,d,e, and f. b is the son of c but c is

not mothers of b. a and c are a married couple, e is the brother of c. d is the daughter of a. f is

the brother of b.

who is the wife of e:

(a) a

(b)f

(c)b

(d) cant be determined

2.Six members of a family are travelling these are a,b,c,d,e, and f. b is the son of c but c is not

mothers of b. a and c are a married couple, e is the brother of c. d is the daughter of a. f is the

brother of b.

which of following is pair of female

(a)ae

(b)bd

(c)df

(d)ad

3. Six members of a family are travelling these are a,b,c,d,e, and f. b is the son of c but c is

not mothers of b. a and c are a married couple, e is the brother of c. d is the daughter of a. f is

the brother of b.

how is e related to d:

(a) father

(b)brother

(c)uncle

(d)none of these

4.There is a group of five teachers a,b,c,d and e

- b and c teaches maths and geography

- a and c teach maths and history

- b and d teach political science and geofraphy

- d and e tech political science and biology

- e teaches biology, history, and political science

who teaches political science, geography and biology

(a)e

(b)d (c)c

(d)b

5. There os a group of five teachers a,b,c,d and e






who teaches in mathematics, political science and geography:

(a) a

(b)b (c)d

(d)e







who teaches maths, geography and history

(a) c

(b)e

(c)a (d)b







who teaches maths, geography and history

(a) e

(b)a

(c)d

(d)c

8.There os a group of five teachers a,b,c,d and e






who teaches political science, history and biology

(a)a

(b)b

(c)c

(d)e

9.1.gita, ravi and suresh are children of. mr. and mrs. khanna

2. renu,raja and sumit are children of mr. and mrs. chopra

3. sumit and gita are married and ashok and sanjay their children

4. garima and ram are children of mr. and mrs. chawla/

5 garima is married to suresh and has three children rata,sonu,raju

how is ravi related to raju

(a)brother

(b)uncle (c)cousin

(d)maternal uncle






how ravi related to ashok

(a)maternal uncle (b)cousin

(c)brother in law

(d)father in law






how is ram related to suresh:

(a)brother

(b)cousin

(c)uncle

(d)brother in law

12. 1.gita, ravi and suresh are children of. mr. and mrs. khanna





what is the surname of sanjay:

(a) chawla

(b) chopra (c) khanna

(d) suresh






how is ram related to rita:

(a) brother

(b) uncle

(c) maternal uncle (d) cousin






renu is sanjay's ----------

(a) sister

(b)sister in law

(c)aunty (d)cousin






raju's sur name is:

(a) chawla

(b)khanna (c)chopra

(d)none of these






sumit and suresh are related as:

(a) brother in law (b)cousin

(c)brother

(d)uncle






how sonu related to ravi.

(a) brother

(b)brother in law

(c)nephew (d)father






how garima is related to mr. & mrs. khanna:

(a)daughter

(b)neice

(c)sister in law

(d)daughter in law






how ashok and sanjay are lated to mr. mrs. copra:

(a)sons

(b)nephews

(c)grand son (d)none of these

20. In the office amongst staff a,b,c,d ,e of g. h there is only computer. a programe has to be

made and can be made by only one person at a time. the office has 3 shifts, the morning shift

from 6 am-12 am has 3 staff, afternoon shift from 12am. to 6 pm. has 3 staff, evening shift

from 6 pm to 12 pm has 2 staff one of the person did not used a printer:

1 b is the last person who use the computer

2 h use the computer after a and came iwth a

3 d used the computer after h and come with h but before e

4 c used the computer before b but arrived after e

5 a use the computer before f and arrived before g

if g used a computer justbefore c who use 4:

(a) a

(b)b

(c)e (d)d









5 a use the computer before f and arrived before g

who arethe person in the night shift.

(a)f g

(b)f e

(c)b e

(d)b c









5 a use the computer before f and arrived before g who use the 2nd computer

(a) a

(b)h (c)d

(d)e









5 a use the computer before f and arrived before g who are the person in the morning shift

(a) hec

(b)ahd (c)efg

(d)dec









5 a use the computer before f and arrived before g who takes first computer

(a) a (b)h

(c)d

(d)e

25. Seven persons p,q,r,s,t,u,v and w are to be assigned seven adjacent chambers on the same

floor in a apartment according to following conditions:

1 u is assigned as far away from r as t is

2 p and r prefer to have adjacent chanmbers

3 v will have to be assigned chamber no. 5

4 q;s work requirs him to speak on phone frequently through out the day.

5 p, s and t all smoke. v is allergic to toacco smoke and must have non smoker in the chamber

ajjacent own.

6 unless otherwise specified all employeed maintain silence in their chambers.the best

location of s in on the floor is:

(a)2 (b)3

(c)4

(d)7

Numerical Aptitude:

1. A certain type of mixture is prepared by mixing brand A at Rs.9 a kg. with brand B at Rs.4

a kg. If the mixture is worth Rs.7 a kg., how many kgs. of brand A are needed to make 40kgs.

of the mixture?

Ans. Brand A needed is 24kgs.

2. A wizard named Nepo says I am only three times my sons age. My father is 40 years more than twice my age. Together the three of us are a mere 1240 years old. How old is Nepo?

Ans. 360 years old.

3. One dog tells the other that there are two dogs in front of me. The other one also shouts

that he too had two behind him. How many are they?

Ans. Three.

4. A man ate 100 bananas in five days, each day eating 6 more than the previous day. How

many bananas did he eat on the first day?

Ans. Eight.

5. If it takes five minutes to boil one egg, how long will it take to boil four eggs?

Ans. Five minutes.

6. Three containers A, B and C have volumes a, b, and c respectively; and container A is full

of water while the other two are empty. If from container A water is poured into container B

which becomes 1/3 full, and into container C which becomes 1/2 full, how much water is left

in container A?

7. ABCE is an isosceles trapezoid and ACDE is a rectangle. AB = 10 and EC = 20. What is

the length of AE?

Ans. AE = 10.

8. In the given figure, PA and PB are tangents to the circle at A and B respectively and the

chord BC is parallel to tangent PA. If AC = 6 cm, and length of the tangent AP is 9 cm, then

what is the length of the chord BC?

Ans. BC = 4 cm.

9. Three cards are drawn at random from an ordinary pack of cards. Find the probability that

they will consist of a king, a queen and an ace.

Ans. 64/2210.

10. A number of cats got together and decided to kill between them 999919 mice. Every cat

killed an equal number of mice. Each cat killed more mice than there were cats. How many

cats do you think there were ?

Ans. 991.

11. If Log2 x 5 Log x + 6 = 0, then what would the value / values of x be? Ans. x = e2 or e3.

12. The square of a two digit number is divided by half the number. After 36 is added to the

quotient, this sum is then divided by 2. The digits of the resulting number are the same as

those in the original number, but they are in reverse order. The tens place of the original number is equal to twice the difference between its digits. What is the number?

Ans. 46

13.Can you tender a one rupee note in such a manner that there shall be total 50 coins but

none of them would be 2 paise coins.?

Ans. 45 one paisa coins, 2 five paise coins, 2 ten paise coins, and 1 twenty-five paise coins.

14.A monkey starts climbing up a tree 20ft. tall. Each hour, it hops 3ft and slips back 2ft.

How much time would it take the monkey to reach the top?

Ans.18 hours.

15. What is the missing number in this series? 8 2 14 6 11 ? 14 6 18 12

Ans. 9

16. The minute hand of a clock overtakes the hour hand at intervals of 64 minutes of correct

time. How much a day does the clock gain or lose?

Ans. 32 8/11 minutes.

17. Solve for x and y: 1/x 1/y = 1/3, 1/x2 + 1/y2 = 5/9. Ans. x = 3/2 or -3 and y = 3 or -3/2.

18. Daal is now being sold at Rs. 20 a kg. During last month its rate was Rs. 16 per kg. By

how much percent should a family reduce its consumption so as to keep the expenditure

fixed?

Ans. 20 %.

19. Find the least value of 3x + 4y if x2y3 = 6.

Ans. 10.

20. Can you find out what day of the week was January 12, 1979?

Ans. Friday.

21. A garrison of 3300 men has provisions for 32 days, when given at a rate of 850 grams per

head. At the end of 7 days a reinforcement arrives and it was found that now the provisions

will last 8 days less, when given at the rate of 825 grams per head. How, many more men can

it feed?

Ans. 1700 men.

22. From 5 different green balls, four different blue balls and three different red balls, how

many combinations of balls can be chosen taking at least one green and one blue ball?

Ans. 3720.

23. Three pipes, A, B, & C are attached to a tank. A & B can fill it in 20 & 30 minutes

respectively while C can empty it in 15 minutes. If A, B & C are kept open successively for 1

minute each, how soon will the tank be filled?

Ans. 167 minutes.

24. A person walking 5/6 of his usual rate is 40 minutes late. What is his usual time?

Ans. 3 hours 20 minutes.

25. Mr. Shah decided to walk down the escalator of a tube station. He found that if he walks

down 26 steps, he requires 30 seconds to reach the bottom. However, if he steps down 34

stairs he would only require 18 seconds to get to the bottom. If the time is measured from the

moment the top step begins to descend to the time he steps off the last step at the bottom, find

out the height of the stair way in steps?

Ans.46 steps.

Technical Questions:

1) The radiation pattern of yagiuda antenna?

a)omnidirectional

b)broadside

c)end side

2)Function of synchro?

a)transducer

b) modulator

c)demodulator

d)encoder & decoder

3)Voltage feedback gives?

4)bcd value of 001100100001?

5)simple questions on logic gates?

6)simple problems on rlc networks?

7)function of RAM?

8)hall effect is used to measure?

9)in RC phaseshift oscillator a condition to get oscillations is hfe>= 4K+23+29/K

10)directivity of half wave dipole is?

11)READY signal is used in MP becoz of slow devices connected..

12)TRAP is non maskable interrupt..

13)value of threshold voltage?

14)function of magnetron?

15) combinational ckt means

a)with memory

b)with out memory

c)constucted with logic gates

d) both b & c

16)what is rom ?

17) take a 4 digit binary noi.e A.and then what is A+Abar=

a)1101

b)1011

c)1111

d)0000

18) if there are 8 rc filter sections what is the individual phase shift?

a)180

b)45

c)22.5

AAI general awareness questions with answers

1 Who is the new chairman of Oil India?

A) N. M. Borah

B) SK Srivastava-Answer

C) S Roy Choudhury

D) None of Them

2 India?s core sector growth for March stood at?

A) 2%-Answer

B) 2.5%

C) 2.2%

D) 6.5%

3Australian Analytics firm Promax has been acquired by which Indian IT company recently?

A) Mahindra Satyam

B) Infosys

C) Wipro-Answer

D) TCS

4Who has been appointed as the new Director General of National Security Guard (NSG)?

A) R K Medhekar

B) NPS Aulakh

C) Subhas Joshi-Answer

D) AK Tandon

5Indian President has re-appointed whom as the Attorney-General for two more years with effect from 8 June

2012?

A) Soli Sorabjee

B) Goolam E. Vahanvati-Answer

C) Milon K. Banerji

D) Ashok Desai

6The RBI has notified all the banks to be ready for Basel III norms which will be effective in phassed manner

from?

A) January 2013-Answer

B) April 2013

C) April 2014

D) December 2013

7Which Indian business house has acquired controlling stake in Pantaloon retail?

A) Reliance Group

B) ADAG Group

C) Aditya Birla group-Answer

D) RPG Group

8Aung San Suu Kyi was sworn in to Myanmar?s parliament in May. She struggled for how many years for the

power?

A) 25 years-Answer

B) 20 Years

C) 15 Years

D) 18 Years

9India?s total exports jumped by which percentage for FY 2011-12?

A) 25%

B) 23%

C) 21%-Answer

D) 29%

10For FY 2011-12, India?s total trade deficit stood at nearly?

A) USD 155 billion

B) USD 205 billion

C) USD 195 billion

D) USD 185 billion-Answer

11 Which Spanish football club tops the Spanish league in 2012?

A) Barcelona

B) Valencia

C) Real Madrid-Answer

D) None of These

12Lionel Messi became the top goal scorer in a season with 68 goals as of now in the history. He broke whose

39 year old record?

A) Sepp Maier

B) Franz Beckenbauer

C) MuellerAnswer

D) Klaus Fischer

13Which developed country has recently become a country with no nuclear power after 4 decades when it shut

down its last nuclear reactor?

A) Germany

B) JapanAnswer

C) France

D) USA

14Which Social Networking company has acquired online hosting services company SlideShare for USD 118.75

million in May 2012?

A) Twitter

B) Facebook

C) LinkedIn-Answer

D) None of These

15Which veteran Bengali Actor has been awarded with most esteemed Dada Saheb Phalke award by Vice

President at the 59th National awards ceremony?

A) Utpal Datta

B) Soumitra Chatterjee

C) Prasenjit

D) None of These

16India has recently approved the tourist Visa on Arrival (TVoA) facility for 3 European countries? Which in the

list is not among them?

A) France

B) Germany

C) Russia

D) Italy

17Patni Computer Systems (PCS) lost its existance when its acquirer removed the brand name from the

combined entity. Who acquired the company last year 2011?

A) Tech Mahindra

B) iGate-Answer

C) Wipro

D) Cognitzant

18Which Indian business group becomes the Only Indian Company to get place in the list of 10 best companies

for Leadership in Asia?

A) TATA Group-Answer

B) Aditya Birla Group

C) Reliance Group

D) Jindal Group

19Which Indian Telecom operator became the first one to launch 4G services?

A) Reliance Communication

B) Bharti Airtel-answer

C) Ideal Cellular

D) BSNL

20Who has been elected as France?s first Socialist president in May 2012?

A) Jacques Chirac

B) Nicolas Sarkozy

C) Francois Hollande-Answer

D) Marine Le Pen

AAI written test questions with detailed explanations for learn and practice (1) The least perfect square number which is divisible by 3,4, 5, 6 and 8 is (a) 900 (b) 1600 (c) 2500

(d) 3600 Ans: ( d ) 3600

2. A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes are equal. What is the total number of notes ? (a) 60 (b) 90 (c) 75 (d) 45 Ans: ( b ) 90

3. In an organization, 40% of the employees are matriculates, 50% of the remaining are graduates and remaining 180 are post-graduates. How many employees are graduates ? (a) 360 (b) 240

(c) 180 (d) 300 Ans: ( c ) 180

4. In class of 100 students 50 students passed in Mathematics and 70 passed in English, 5 students failed in both Mathematics and English. How many students passed in both the subjects? (a) 25

(b) 30

(c) 50

(d) 45 Ans a

5. If 10 cats can kill 10 rats in 10 minutes how long will it take 100 cats to kill 100 rats (a) 1 minutes

(b) 10 minute

(c) 100 minutes

(d) 10000 minutes Ans b

6. A clock shows the time as 6 a.m. If the minute hand gains 2 minutes every hour, how many

minutes will the clock gain by 9 p.m.? (a) 30 minutes (b) 25 minutes (c) 28 minutes (d) 34 minutes Ans a

AAI General Awareness Questions 7. National Institute of Oceanography is located in :

a. Calcutta b. Chennai c. Mangalore d. Panaji Ans d

8 The 2004 Olympics were held in : a. Bangkok b. Rome c. Athens

d. Nagasaki Ans : c

9 . Who headed the committee appointed on Kargil War ? a. Gen. V. P. Malik b. Gen. S. K. Sinha

c. K. Subramanyam d. K. C. Panth Ans : c

10 . The C. K. Nayudu Trophy is related to the sport of a. cricket b. Hockey

c. Football d. Chess Ans : a

11. New York is situated on the river

a. Hudson b. Thames c. Danube

d. Tigris Ans : a

12 The Woman of the Millennium? selected by the British Broadcasting Corporation (BBC) is a. Margaret Thacher b. Hillary Clinton c. Chandrika Kumaratunga

d. Indira Gandhi Ans : d

13 . On 21 February 2012.Government and the Airport Authority of India AAI signed a memorandum of understanding (MOU) to establish airports in ? Ans Jharkand Government,Jamshedpur and Bokaro

14. Territorial waters of India extends up to how many nautical miles ? (a) 8

(b) 12

(c) 16

(d) 22 Ans b

15. The General Assembly of United Nations meets a. Once a year b. twice a year

c. thrice a year d. Once in five years Ans : a

16. The Finance Minister ofIndia recently made a mention that Infrastructure Development in India should be done on PPP model only. What is the full form of?PPP?? a) Purchasing Power Parity b) Public Private Partnership c) Purchase Produce Provide

d) People?s Programme & Priority

e) None of these Ans b

17 . The Golden Peacock Award for the Best Film was given to which of the following films at the 42nd International Film Festival of India which came to an end at the Kala Academy in Panaji, Goa on 3 December 2011? a) Russian film Elena b) an Israeli film Restoration c) Columbian Film Porfirio d) Malayalam film Adaminte Makan Abu Ans c

18 As per estimates given by the RBI the Economic Growth during the year 2010-11 will be at

which of the following levels ? (A) 65% (B) 7%

(C) 75% (D) 8% (E) None of these Ans : (D)

AAI Technical Section :: 19. In a communication system, noise is most likely to affect the signal

(a) at the destination (b) In the channel (c) in the information source (d) at the transmitter Ans :: b

20. Broadband long distance communications are originally made possible by the advent of (a) telegraph cables (b) repeater amplifiers

(c) HF radio (d) Geostationary satellites Ans :: b

21 Which of the following characterizes an analog quantity? (a) Discrete levels represent changes in a quantity. (b)Its values follow a logarithmic response curve. (c)It can be described with a finite number of steps.

(d)It has a continuous set of values over a given range. Ans d

22. A differential amplifier has a differential gain of 20,000 . CMRR=80 dB. The common mode gain is given by (a) 2

(b) 1

c) 1/2

(d) 0 Ans :: a

23. Indicate the false statement. Fourier analysis shows that the saw tooth wave consist of (a) fundamental and subharmonic sine waves (b) a fundamental sine wave and an infinite number of harmonics (c) fundamental and harmonic sine waves whose amplitude decreases with the harmonic number

(d) sinusoidal voltages, some of which are small enough to ignore in practice Ans :: a

24. The most commonly used amplifier in sample & hold circuits is a) A unity gain non-inverting amplifier

b) A unity gain inverting amplifier c) An inverting amplifier with a gain of 10

d) An inverting amplifiers with a gain of 100 Ans :: b

25. What is the maximum data rate sustainable by a noisy channel with a bandwidth of 10KHz and a signal to noise ratio of 2047? (a) 110 Kbps

(b) 1 Kbps

(c) 20 Kbps

(d) 1023 Kbps

e) 10 Kbps

26 UTP cables are twisted to (a) reduce the cross talk.

(b) decrease the length.

(c) strengthen them. (d) make them easier to use in networks.

(e) reduce the cost of manufacturing.

27 Select the correct statement(s). (a) The physical topology of an Ethernet LAN connected through a switch is a star. (b) The physical topology of an Ethernet LAN connected through a Hub is a Star topology. (c) The physical and logical topologies of networks are always different. (d) The Internet can be considered as a network with a Bus topology. (e) The physical topology of all types of Ethernet LANs is a Bus topology.

28. waveguide are generally made of

(a) Aluminium (b) Bronze (c) Both (a) and (b) (d) none of these Ans :: c

29. Which type of signal is represented by discrete values? (a) noisy signal (b) nonlinear (c) analog

(d) digital Ans :: d

30 What is the subnet mask of the network identified as 10.16.48.0/20 in dotted decimal notation? (a) 255.255.255.0

(b) 255.255.240.0

(c) 10.16.48.255

(d) 10.255.255.255

(e) 255.255..254.0

31 Select the correct statements.

(a) HTTP uses TCP as the transport protocol. (b) HTTP uses TCP as well as UDP as the transport protocol. (c) SMTP uses UDP as the transport protocol. (d) DNS uses UDP as the transport protocol. (e) SMTP uses TCP as the transport protocol

32 Given BCD number 1001 0011, its decimal equivalent is (a) 147 (b) 143 (c) 93

(d) 39 Ans :: c

33 In differential amplifiers, the common emitter current is made constant (a) To make Ad (differential gain) very small (b) To make Ac (common mode gain) very small (c) To make the amplifier symmetrical (d) To keep CMRR constant

Ans :: b 34 . Converting data into signals by transforming and encoding the information to produce electromagnetic signals is the functionality of a (a) source

(b) transmitter (c) receiver (d) destination Ans :: b

35. Switching systems

(a) Improve the efficiency of data transfer (b) are not used in data system (c) require additional lines (d) are limited to small data networks Ans :: a

36 . Microwave following the curvature of earth, is know as

(a) fading (b) Ducting (c) troposphere scatter (d) ionosphere reflection Ans :: b

37 ndicate the false statement. The square of the thermal noise voltage generated by a resistor is proportional to (a) its temperature

(b) Its resistance (c) Boltzmann?s Constant (d) the bandwidth over which it is measured Ans :: a

38. If the plate supply voltage for a plate modulated class C amplifier is V, the maximum plate-cathode voltage could be almost as high as

(a)4v (b)3v (c)2v (d)1v Ans :: a AAI ATC,Electronics Study Material ::

1) Radar is a contraction of word ________ .

2) Radar range is measure in ______ unit. 3) What do you mean by second time around echoes. 4) What do you mean by maximum unambiguous range.

5) What is pulse repetition frequency? 6) What is minimum detectable signal. 7) Which factor affects the maximum radar range.

8) Frequency bands for radar system is _____ .

9) What do you mean by false alarm. 10) What is radar cross section of target. 11) MTI stands for ____ .

12) What do you mean by coherent signal. 13) What do you mean by non coherent signal. 14) What is function of delay line canceller.

15) What is function of phase detector.

16) Why output of MTI stage is bipolar 17) What is function of Tracking radar.

18) Which are the different methods for generating error signal in Tracking radar. 19) Explain function of COHO & STALO in MTI radar. 20) Explain function of duplexer. 21) What is Klystron.

22) Which are the different types of klystron. 23) What is the use of klystron.

24) What do you mean by mode.

25) What is the condition for maximum amplification in klystron.

26) How much is the efficiency of reflex klystron. 27) How much is the efficiency of magnetron.

28) Why magnetron is called cross field device. 29) Which mode is used for oscillation in magnetron. 30) How R. F. field is generated in magnetron.

31) What do you mean by Directivity. 32) What is power gain.

33) What is Effective aperture area

34) What is effective length. 35) What is aperture efficiency. 36) What is radiation resistance. 37) What do you mean by efficiency.

38) What is radiation intensity. 39) Which are the different feeds for paraboloids. 40) Which are the different types of lens antennas.

41) What is the function of radar receiver. 42) What do you mean by noise figure. 43) First stage of radar receiver is _____ .

44) What is the function of mixer. 45) What is the function of duplexer. 46) Which are the different types of duplexers. 47) What is the function of display unit.

48) Which are the important parameters of mixer. 49) What is conversion loss. 50) What is low noise temperature loss.

51) what do you mean by clutter. 52) Which are the different types of clutters. 53) What do you mean by radar cross section .

54) What do you mean by surface clutter. 55) What is angel echoes.

56) What is sea clutter.

57) What is function of synthetic aperture radar 58) What is the function of HF over horizon radar.

59) What is use of synthetic aperture radar. 60) What is use of Hf over horizon radar.

AAI Previous years questions Total 100 Qns. Around 50 technical . Only 28 of the technical is added here. Some of the questions are not complete.

1.Which of the following schemes have the best error performance with the same energy per bit? a.16QAM b.16PSK c. QPSK

2Same Antenna is used for Tx and Rx. Radar range related to Antenna gain as a.Directly prop. To G bDirec. Prop. To sq. root of G c.Inversely prop to G 3.Thermal Noise in conductor related to B

aB b.1/B c.B2 d.Square root of B

4.A control system with feedback gains 0.1 and forward gains 10. What is the sensitivity of the

system w.r.t the feedback system? 5.The value of k for the system to be stable is. ( 6th degree Characteristic Eqn given) 6.Which of the following system is stable? a.As2 + Bs +C b.As2 - Bs +C

c.As4 + B s3 +Cs+D d.As2 - Bs -C 7.Linux OS based on which architecture 8.Comparison betweeb Macro and Subroutine

a.Macro better that Sub Rtne with respect to storage time and execution time

b.Vice versa c.Macro better that Sub Rtne with respect to execution time only d.Vice versa 9.Which of the following is a privileged instruction? aMOV A B

b.INT 21 c.ADD A B d.IN 08 10.Which of the following instruction is not converted to binary by an Assebly Language Program? a.TRAP b.Interrupt

c.Privilige instruction

11.In which type of machine can multiple tasks be done

12.Which of the following has the highest distortion? a.A b.B c.AB

d.C 13.Which of the following distortions occur in Class B push pull amplifier? a.Harmonic b.Intermodulation c.Phase

14.(s)/T(s) of a rotational system (J,B,k regular notaions) 15.Schmitt Trigger with 3V & 1V UTP and LTP respectively. A sinusoidal input with 10V peak is fed as the input.

The output swings between

16.Op-amp circuit given. Identify the circuit (Ans: Peak detector) 17.6 bit binary ladder with 101001 as input ( 0= 0V , 1 = 10V). Output voltage is ------ 18.Doppler Radar of 1125 MHz. Frequency of received echo is 125 MHz. The conclusion is a.Target also has a radar b.Target moving away

c.Target approaching 19.Microprocessor cycles between a.Fetch and Execution operations. b.Fetch and Halt

20.Modulation index of an FM system with 2.5V, 500 Hz input and 5KHz deviation is

21Rouths Criterion gives a.Number of roots on the LHS of S plane b.Number of roots on the RHS of S plane 22.For the system to be stable, the roots of the characteristic Equation must lie

a.Left side of the S plane b.Right side of s plane 23.Impulse response h(t) of a system is a.Inverse Laplace

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