Winter
2014, ASSIGNMENT
PROGRAM
– BCA (REVISED FALL 2012)
SEMESTER
- 2
SUBJECT
CODE & NAME - BCA2030- OBJECT ORIENTED PROGRAMMING – C++
CREDIT
– 4 BK ID - B1641, MAX. MARKS - 60
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Q. No.1 Differentiate between
Classes and Objects. Write an example program to represent a class and its
object. 4+6= 10
Answer:
Classes
and objects are separate but related concepts. Every object belongs to a class
and every class contains one or more related objects.
Q2. Differentiate between While and
Do-While loop.
Answer:
Tested
first and then the statements are executed if the condition turns out to be
true.
In
do while the statements are executed for the first time and then the conditions
are tested, if the condition turns out to be true then the statements are
executed again.
2.
A do while is used for a block of code that must be executed at least once.
These
situations tend to be relatively rare, thus the simple while is more commonly
used.
3.
A do while loop runs at least once even though the the condition given is false
while
loop do not run in case the condition given is false
4.
In a while loop the condition is first tested and if it returns true then it
goes in the loop
In
a do-while loop the condition is tested at the last.
5.
While loop is entry control loop
where
as do while is exit control loop.
Q3. Differentiate between
Constructors and Destructors.
Answer: Constructor:
Q4. What are the advantages of
Polymorphism? How it can be implemented? 5+5=10
Answer:
Advantages
·
Code is simpler to write (and read)
·
Uniform interface for clients, i.e.,
type specific details only in class code, not in the client code
Q5. Write a program in C++ to
calculate the area of the circle when radius is given from the keyboard.
Answer:
#include
<iostream.h>
Q6. Write a program in C++ to
demonstrate the use of constructors.
Answer:
#include<iostream.h>
#include<conio.h>
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