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Reg No.:_. Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
SIXTH SEMESTER B.TECH DEGREE EXAMINATION(S), DECEMBER 2019

Course Code: EC312
Course Name:Object Oriented Programming

Max. Marks: 100 Duration: 3 Hours
PARTA

Answer any two full questions, each carries 15 marks Marks

1 a) Write aclass to represent a 3D vector. Include member functions to perform the (10)

following tasks:

i) to create the vector

ii) to multiply by a scalar value

iii) find the magnitude of vector

iv) to display the vector in the form (10, 20, 30,...)
Write a main function to implement this class.

b) What is the need of constructors in an object oriented program? Give any three (5)
constructors in C++.

2 a) Distinguish between class and object in ೩ program. (4)

b) With proper explanation, give the output of the following program (8)

#include
void calc(int& x,int y)
{ inttemp=x+y;

x+ = temp;
yt=temp;
}

void main( )

{ int a = 50,b=20;

calc(a,b);

cout<< ಓರ್‌ ಅರಸರು ಲ;
}

c) What is a virtual base class? (3)

3 a) Explain the characteristics of a friend function. Write a programming example to (8)
demonstrate the use of a friend function as the bridge between two classes.
b) Write a program to demonstrate multiple inheritance in C++ (7)
PART 1
Answer any two full questions, each carries 15 marks

4 a) What isa virtual function? Why do we need virtual function in an object oriented (8)

program?
b) Compare and contrast Java and C++. (7)
5 a) Give a programming example to show the use of a pure virtual function. (8)
b) What is a multi-threaded program? How Java implements multi-threaded (7)
program?

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