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MAY/JUNE 2006

Third Semester

COMPUTER SCIENCE AND ENGINEERING

CS1204 - OBJECT ORIENTED PROGRAMMING

PART A

1. What is object oriented programming? How is it different from the procedureoriented programming?

Object Oriented programming is an approach that provides a way of

modularizing programs by creating partitioned memory area for both data and

functions that can be used us templates for creating copies of such modules on

demand.

Object oriented programming is suitable for the description of

abstraction objects. But it is not suitable for procedure oriented programming.

2. How does an inline function differ from a preprocessor macro?A preprocessor macro consist of their function body before the complation.

But inline function have explicit function.

3. How do we declare a member of class static?Class classname

{

----

----

Static DataType Datamember;

----

};

Datatype ClassName::DataMember=InitialValue;

4. Can friendship between classes be symmetric or transitive? Justify your answer withan example?

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It provide transitive. It can be either declared in the private part or the public

part of the class without affecting meaning.

5. Explain the various file stream classes needed for manipulator?Ifstreamhandling Input

Ofstream handling Output

Fstream handling Input & Output

6. What are file pointers? Describe get-pointers an put-pointers.The file management system associates file pointers with each file, called file

pointers. The get-pointer specifies a location from where the current reading

operation is initiated. The put pointer specifies a location from where the current

writing operation is initiated.

7. Define Java Virtual Machine?Java enables the creation of cross-plot forme programs by compiling the code

into an intermediate representation called Java byte code. This code can be

interpreted on any system that has a Java virtual machine.

8. What is the major difference between interface and a class?

Interface Class

The interface should notcontain implementation for its

method

It contains implementation forits method.

An interface, which is

implemented with in class

Classed are able to access

methods of an

9. What is a package?Packages are containers for classes that are used to compartmentalize the class name

space. Packages are stored in a hierarchical manner and are explicitly imported into

new class definitions.

10.What are the two methods by which we may stop threads?Athread.stop(); it moves to dead state

Sleet(); blocked for specified time.

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PART - B

11.(i) What is Copy constructor?Explain it with suitable C++ coding?

Syntax:

Classname(classname & object-ref)

Program:

#include

#include

class complex

{

int r,i;

public:complex(int a,int b)

{

r=a;

i=b;

}

complex(complex c)

{

r=c.r;

r=c.i;

}

void show()

{

cout

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couty;

complex c1(x,y);

compelx c2(c1);

cout

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{

d=d+s1.d;

}

};

void main()

{

sample s3;

sample s4(6);

sample s5(7);

clrscr();

s3=s4;

s5+=s4;

cout

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(ii) What are the differences between reference variable and normal variables? Why

cannot a constant value be initialized to variables of reference type?

(b)(i) What are the differences between pointers to constants and constant pointers?

Give example?

(ii) What are the advantages of using pointers in programming? Explain addressing

mode required to access memory location using pointers.

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13.(a)(i)Write a program which copies the contents of one file to a new file by

removing unnecessary spaces between words.

(ii) Write a program to print the ASCII table using streams.

13(b)(i) What is the difference between the statements?

Cin>>ch;

Ch=c in.get();

(ii) Write a program to overload the insertion and deletion operators in c++.

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14(a)(i) Give an example that fits the following inheritance hierarchy.

14(b) Write statements that performs the following single-subscribed array operations:

set the 10 elements of integer array counts to zeros.

Add 1 to each of the 15 elements of integer array bonus

Print the five values of integer array best scores in column format.

A

B

C

Write a Java program to implement theexample

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15(a)(i) Explain Multithreading with suitable java code .

(ii) Write a program that accepts a name list of five students from the command line and

store them in a vector.

(b) What is the purpose of using packages? How do you create user-defined package? Give

an example.