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UNIVERSITI TEKNOLOGI MARA

FINAL EXAMINATION

COURSE

COURSE CODE

EXAMINATION

TIME

OBJECT-ORIENTED PROGRAMMING

CSC435

JANUARY 2013

3 HOURS

INSTRUCTIONS TO CANDIDATES

1. This question paper cons ists of two (2) parts : PART A (10 Que stions)

PART B (6 Que stions)

2. Answer ALL questions in the Answer Booklet. Start each answer on a new page.

3. Do not bring any material into the exam ination room unless perm ission is given by the

invigilator.

4.

Please check to make sure that this examination pack consists o f.

i) the Que stion Paper

ii) an Ans wer Book let - provided by the Faculty

DO NOT TURN

T IS

PAGE

UNTIL

YOU ARE TOLD TO DO SO

This examination pape r consists of

1

printed page s

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PART A 20 MARKS )

1.

A /An is an operation which can modify an object

behavior.

A. attribute

B. field

C. method

D. program

2.

All the objects variables should be placed in the private access modifier,. These

define the state of the object. As the name suggests, the variables are going to be

private, that is they cannot be accessed from outside of the class declaration. This

concept is known as .

A. encapsulation

B. informa tion hiding

C. polymorphism

D. abstraction

3. Given the following program segment.

public class PAQ3 {

public static void main(String[] args) {

int x = 3, y = - 2 , z = 0;

Calculate(x,y,z);

System.out.print(Calculate(y,z));

}

public static void Calculate(int a, int b,

c = a - b; }

public static int Calculate (int p, int q)

return (p - q ) ; }

}//endclass

int c) {

{

By referring the above program segment, which statement is FALSE?

A. The result i s - 2 .

B. The result is - 7 .

C. The function C a l c u l a t e (...) is overloaded.

D. The above program segment applies the passing parameter by value only.

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4. Given the following program seg m ent:

public class PAQ4 {

public static void main(String[] args) {

String secretWord = Mississippi ;

fo r i n t x = 10; x >0; x=x -2) {

S y s t e m . o u t . p r i n t s e c r e t W o r d . c h a r A t x ) ) ; }

}

}//end c l a s s

W hat is the output of the above program segment?

A. sippi

B. sispi

C. ipsip

D. ipsis

5. Wh ich of the following examp les shows receiving object as parameter?

i. public static void XYZ (String name , Date dateOfBirth)

ii. public static void XYZ (int x, int y)

iii. public static int XYZ (Student stud)

A. i only

B. i and ii

C. i and iii

D. i,ii and iii

6. The following classes are predefined classes EXC EPT

A. Date

B. Double

C. Animal

D. Integer

7. Given the following program fragment.

public class University {

//attributes :

private String uniCode;

private String uniName;

private String uniChancellorName;

//methods :

//Constructors

//mutators

//retrievers

//printer

}

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By referring the U n i v e r s i t y c lass, determine the CORRECT Java code

statements in the main program to update the chancellor's name. Assume that the

object name is u n i .

A. uni.setChancellorName(newChancellorName);

B.

uni.getChancellorName(newChancellorName);

C. University uni = new University( IPTA03 , Universiti

Sains Malaysia , DYTM Tuanku Raja

Perlis );

D. University uni = new University( DYTM Tuanku Raja

Perlis );

Which of the following stateme nts areTRUEabout inheritance?

i. Inheritance allows an object to inherit charac teristics from anothe r object,

ii.

An object is able to pass on its state and behaviors to its children ,

iii.

The objects need to have characteristics in comm on with each other.

A.

B.

C.

D.

i only

i and ii

i and iii

i,ii and iii

9. Polymorphism is an Object Oriented concept which advice use of

instead of implementation.

A. concrete, comm on interface

B. comm on interface, concrete

C. methods sharing, extends

D. protected, private

10.

Which of the following statements areTRUEabout reading and writing text file?

i. It's almos t always a good idea to use buffering.

ii.

It's often possible to use references to abstract base classe s, instead of

references to specific concrete classes,

iii.

There is always a need to pay attention to exceptions.

A.

B.

C.

D.

i and ii

i and iii

ii and iii

i, ii and

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PART B 80 MARKS )

QUESTION 1

a) Write a function named S p he re S u rf ac eA re a () which calculate the area of sphere

surface. The function receives the radius of sphere as integer data type of parameter

from the main program and returns the surface area. The formula of sphere surface

area is as follows.

Sphere surface area = 4* pi*r

2

where pi = 3.142

(2 marks)

b) Write a function named sp he re Vo lum e () which calculate the volume of sphere.

The function receives the radius of sphere as integer data type of parameter from the

main program. Display the volume of sphere in the function. The formula of sphere

volume is as follows.

Sphere volume = 4/3)* pi *r

3

where pi = 3.142

(2 marks)

c) Write a function named H ig he st S ph e re V o lu m e () which returns the highest

volume of sphere. The function receives an array of variable as parameter which

stores 10 different volumes of sphere volumes as double data type from the main

program.

(4 marks)

QUESTION2

a) Academ ic Affairs Department has suggested to InfoTech Department to develop an

application to trace the UiTM graduates employability. The purpose of this

application is to determine the marketability of UiTM Students' after graduation.

Among the important information that are needed in the application are the duration

of getting the job after graduate and the relevancy of the job with their field of

studies.

i. Identify the object.

ii.

List six (6) appropriate attributes.

(4 marks)

b) Explain the difference for each of the following term s,

i. class and object

ii.

overloading and overriding

(4 marks)

c) Explain four (4) advantages of Object Oriented approach .

(4 marks)

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QUESTION

The appeal process of paper rechecking is opened for two weeks after the result is

announced

to

students.

The

charge

of

paper rechecking

is RM 50 per

paper.

The

following

class showsthedata m embersofPa perR ech eck ing c lass .

pu bl ic cla ss PaperRechecking {

/ / a t t r i b u t e s :

pri vat e Stri ng s tudID; / / s tu de nt id

private String studName; //student name

pr i va t e St ri n g subjec tCode ; / / sub je ct code, e. g: CSC435

pr iv at e in t previousMark; / / t he mark obta ine d before the

/ /rechecking process

pr i va t e in t newMark; / / the mark obt ain ed af t e r the

/ /

rechecking process

//methods :

Constructors

Mutators

Retrievers

Processor

Printer

}

a) Writeafunction definitionforeachofthe following questions,

i. Normal constructor.

II. A mutator.

Retrieverforany4attributes.

(2.5 marks)

(2.5 marks)

(2 marks)

IV A Processor named Disp layChanges ) which display the changesof

mark. The following table shows the appropriate message that shouldbe

displayed.

Previous

Mark

New

Mark

Message

Higher

Lower

Lower

Higher

' Sums

K after recheck deducted

Mark - newMark)

The mark after recheck added newMark -

previousMark)

No changesofmark

(3 marks)

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b) Writeaprogram segm entin themain programforeachofthe following questions.

i. Createanarrayofobject named pR ec he ck ing andthearray sizeis100.

(1 mark)

ii. Display all subject codes, the changes of marks, total codes and total

charges, recheckedby astudent named ANbinHassan .

(4 marks)

QUESTION

4

UiTMTopExecutivescanbeclassifiedas aRectorof acampusorDeanof afaculty. Given

the followingareE x e c u t i v e s , CampusandF a c u l t y c lasses .

Super class

: E x e c u t i v e s

Attr ibutes:

St ri ng executiveName; //name of the executive

Strin g de sign ati on; //example:

Prof, or

Associate

Prof.

St ri ng appo in tme nt Sta rt Date ; // fo rma t: dd/mm/yyyy

St ri ng appointmentEndDate; // fo rm at : dd/mm/yyyy

Subclass:

Campus

Attr ibutes:

String campusCode;//example: 'R' for P e r l i s , D' for Terengganu

String campusName; //name

of the

campus

Str ing a rea ; / / l oca t i on

of the

campus

Subclass:

F a c u l t y

Attr ibutes:

String facultyCode;//example:

FSG for

Fakulti Sains Gunaan

String facultyName;//nameof thefaculty

a) Writeafunction definitionforeachofthe following questions.

i. Norm al constructorforboth subclasses.

(4 marks)

ii.

Retriever methods

for

E xe c u t i ve super c lass.

(2 marks)

iii.

Printer me thods

for

both subc lasses.

(3 marks)

b) Writeaprogram segm entforeachofthe following questions.

i. Declareanarray named ex ec s andthesizeofarrayofobjectis100.

(0.5 marks)

ii. Write a program segment to determine totals Rectors that have been

appointedin 2012.

(3 marks)

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iii.

Write a program segment to display all executives' names , faculty code and

faculty name.

(2.5 marks)

QUESTION 5

Each student is required to enroll either registered club or sports as part of university

graduation requirement. The student should maintain the enrollment until they are

graduating. Among the registered clubs at UiTM are KEMBARA, Kebudayaan and

Entrepreneurship. The registered sports are football, basketball, rugby, badminton and

squash.

The university gives some incentives to those students who are holding a position as

presidents, secretary or treasurer of any clubs. Similarly to sports, the students will be given

incentives when they are representing as UiTM players at any international or national

competition. The incentive rate depends on the player's level either amateur or professional.

Table 1 shows the rate of incentives given to those students who are ho lding imp ortant

position of any clubs.

Position Incentive Rate/Semester

RIV

Secretary RM 200

Treasurer RM 150

Table 1

Table 2 shows the rate of incentives given to those students who are representing UiTM as

players which depe nds on the p layer's level.

^ } ^^

Incentive Rate/Competition

Ams

Professional RM 120

Table 2

Given

the following

classes are

student,Clubs

and

Sports.

Super class students

Attributes :

String

studID; // student id

String studName; // student name

String studProg; // student program

Subclass lubs

Attributes :

String

clubName; // club name

String

clubPosition; // club position either president,

// secretary, treasurer or none

Subclass Sports

Attributes : String sportsName; // sports name

String playerLevel; // players's level either

amateur

or

// professional

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int totalCompetition; //total competition involved

//in a semester

a) Wr ite a method named C a lc u la t e in c e n t i v e s ( ) for both subc lasses, which

return the total incentives as shown in Table 1and Table 2.

(6 marks)

c) Write a program segment for each of the following questions. Assume that 100

records of students' profiles have been stored in an array of object named s t u d .

i. Write a program segment to determine total amateurs students' who are

involved in the football game .

(3 marks)

ii.

Write a program segment to determine total incentives that have been paid

to all students who are holding a position as secretary in all clubs.

(3 marks)

iii. Write a program segment to search the student's name that has the highest

involvement of com petitions.

(3 marks)

QUESTION 6

Given the fol lowing text f ile named Bo ok sB orr ow ed Ov erd ue . t x t .

File Edit Format

|2011765482

2010647728

2010982718

2009121235

2008628892

2009277211

2008288383

2009123453

2007992911

2009123321

2008669925

2009187000

2009237333

2010200100

2011228929

2010889294

2011111921

2010101020

2010202021

2010201077

2011776631

2010010007

2008669925

View Help

samiha Jamil

Jamaliah Bakar

Sabri Ahmad

Jusoh zamri

zaleha Buang

Mail dansaleh

Suki Mohd Ali

Jamil ah Ahmad

Kursiah Kahari

Johari Bilal

zakaria Jalil

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zalifah Rashid

Kusin Ramli

saliha Jasin

shakir sal i in

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Ahamad Ali

Mariah Mohamed

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Assume the above text file consists of thousands of records. The attributes of the above files

are the student's ID, student's name, the month and year of overdue, total books which are

overdue and total days of overdue.

Write a program segment to perform the following tasks.

a) Read all records from the f ile named Bo ok sB orr ow ed O ve rd ue . t x t .

(5 marks)

b) Wri te a program segment to produce the text f ile named O v e rd u e Ja n 2 0 1 2 . tx t

which stores all records of overdue in Jan 2012 .

(4 marks)

c) Write a program segment to calculate the total charges of overdue collected in

January and February 201 2. Given the overdue charge is 20 cents per day per book.

(4 marks)

d) Use exception handling operations to deal with input and output errors.

(2 marks)

END OF QUESTION PAPER

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