Download pdf - computer class Ix

8/7/2019 computer class Ix

http://slidepdf.com/reader/full/computer-class-ix 1/4

MIGHTY MINDS’ ACADEMYPreliminary examination 2010-2011

Class: IX Paper: Computer Marks: 15

Section “A” (Compulsory)(Multiple Choice Questions)

Q1: Choose the correct answer for each from the given options. 15

1) Computer can recognize a total of ______________ different characters.(a) 275 (b) 255 (c) 235 (d) 256

2) ____________ is the place that is used to connect various external devices to thecomputer.

(a) serial (b) USB (c) Port (d) Prallel3) ______________ translates the whole program in a machine language at a time andstores the translated program on disk.

(a) Translators (b) Tool bar (c) ROM (d) None4) The major invention of the first generation of computer was ______________.

(a) Mark-1 (b) Osborn-1 (c) Univac (d) None5) ____________ port is also known as male connector.

(a) Parallel (b) serial (c) Equal (d) None6) 1 KB = ____________________ bytes.

(a) 1136 (b) 1024 (c) 2048 (d) 10007) Laser printer and inkjet printer are example of ________________.

(a) Line printer (b) Impact printer (c) Non-Impact printer 8) The bar displayed at the bottom of the desktop is known as ________________.

(a) Title bar (b) Task bar (c) Menu bar (d) Tool bar 9) ___________ generation is called the generation of artificial intellgence.(a) Third (b) First (c) fifth (d) second

10) ______________ is the characteristics of a monitor that affects the sharpness of image.

(a) Net pitch (b) Path pitch (c) Dot pitch (d) None11) The base of octal number system is _______________.

(a) 2 (b) 4 (c) 16 (d) 812) The complement of 100110 is ___________________.

(a) 110011 (b) 011001 (c) 011100 (d) 10001013) ____________ is a set of program that controls and supercises the operations of thecomputer.

(a) Disk operation system (b) Operating system(c) Programming system (d) None

14) The image or colour set in the background of the desktop is ________________.(a) screen sever (b) Picture (c) Monogram (d) Wallpaper

15) A program written in high level language is called ____________.



(a) Hard program (b) source program(c) Correct program (d) system program



MIGHTY MINDS’ ACADEMYPreliminary examination 2010-2011

Class: IX Paper: Computer M. Marks: 60

Section “B” (Short –Answer questions) 36

Note: Attempt any nine questions from this section. All questions carry equal marks.

Q2: (i) Define a programming language and state its types.(ii) Describe the properties of windows operating system.(iii) Differenciate between the serial port and parallel port.(iv) Differentaite between data and information.(v) What is Boolean Algebra?(vi) Define an impact printer and a non-impact printer. Give examples(vii) Differenciate between hardware and softwarwe.(viii) What is the difference between a compiler and interpreter.(ix) Define an input device and describe Mouse or light pen.(x) Solve the following.

(a) 110011 2 + 1011011 2 (b) 1001 2 x 111 2

(c) 101101 2 + 111001 2 (d) 2’s complement of 10010111 2

(xi) Prove the following equation and draw the truth table.( A + B ) ( A + B ) = A + BC

(xii) solve the following.(a) 110011 2 = (?) 10 (b) 8236 10 = (?) 8

(c) 352 8 = (?) 2 (d) 2900 10 = (?) 16

(xiii) Use a karnaugh map to simplify each of the given expression.(a) ABC ABC ABC ABC + + + (b) AB AB AB+ +

Section “C” (Detailed answer questions. 24Note: Attempt any two questions from this section. All questions carry equal marks.

Q3: (a) What is number system? Describe the different types of number system used in thecomputer system.(b) Draw the generation table and describe the generation of computer.

Q4: (a) What is the difference between DOS and windows operating system.(b) Define CPU. What are the main units of a CPU? Explain each unit with the help pf ablock diagram.

Q5: (a) Define a Bus. What are the purpose of address bus, control bus and Data bus?(b) Write notes on Taskbar, Windows explorer and virus.

