Constructors

Question 1

Constructor Definition

Answer 1

A constructor is a member method having the same name as
that of the class and is used to initialize the instance
variables of the Objects.

Question 2

Return type of constructor

Answer 2

No return type; not even void

Question 3

Use of constructor

Answer 3

To initialize data members / instance variables
Eg: class sum
{
int a, b;
sum() → constructor
{ 0=0,6=0;
}

Question 4

How can constructor be invoked?

Answer 4

At the time of creating an object of a class

Question 5

Constructor is automatically/manually called

Answer 5

Automatically

Question 6

Features of constructor

Answer 6

same name as class name
No return type; not even void
called automatically when object is created
Used to initialize data members
constructor is ALWAYS public

Question 7

Two types of constructors

Answer 7

Parameterized
Non-parameterized

Question 8

Non parameterized constructor?

Answer 8

A constructor which Initialized the instance variables of an object with definite values readily available within it.

Question 9

Parameterized constructor?

Answer 9

Initializes instance variables with the help of parameters passed in it at the time of creating an object

Question 10

Default constructor

Answer 10

Non_parameterized constructor which is used to initialize instance variables with default values of datatype
! No syntax for constructor is written!

Question 11

Constructor overloading?

Answer 11

Using a number of constructors with the same name but different types of parameters.