A ________ is a member function that is automatically called when a class object is ________.

_________ is used to declare and initialize an object from another object of same class in C++.

  1. Copy constructor
  2. Default constructor
  3. Overloaded constructor
  4. Non-parametrized constructor

Answer (Detailed Solution Below)

Option 1 : Copy constructor

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Child Development and Pedagogy Mock Test

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A constructor is a member function of a class that initializes objects of a class. In C++, Constructor is automatically called when an object (instance of a class) creates. It is a special member function of the class.

Syntax

class_name(parameter1, parameter2, ...)

{

    // constructor Definition

}

Default Constructor

It is the constructor that doesn’t take any argument. It has no parameters.

Parameterized Constructors

It is possible to pass arguments to constructors. Typically, these arguments help initialize an object when it is created. 

Copy Constructor

A copy constructor is a member function that initializes an object using another object of the same class.

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a ____ is a member function that is automatically called when a class object is __.
a. destructor created
b. static function, deallocated
c. constructor, created
d. utility function declared
e. None of these

MCQs Answer:

c. constructor created


C++ Program to show that constructor is a member function that is automatically called when a class object is created

#include<iostream>

usingnamespacestd;

classMCQs

{

public:

MCQs(){

cout<<"welcome to T4Tutorials.com"<<endl;

}

};

intmain(){

MCQsx,y,z;

}

Output

Welcome to T4Tutorials.com

Welcome to T4Tutorials.com

Welcome to T4Tutorials.com

In this example we have three objects X, Y, X. so let’s see what happens.

object X

When object x is created, then MCQs() function is called and it will print “Welcome to T4Tutorials.com”.

object Y

When object Y is created, then MCQs() function is called and it will print “Welcome to T4Tutorials.com”.

object Z

When object Z is created, then MCQs() function is called and it will print “Welcome to T4Tutorials.com”.

A ________ is a member function that is automatically called when a class object is ________.
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Which of the following is automatically called when an object is destroyed?

A destructor is a member of a function which is automatically called when the class is destroyed.

Which operator can be used by an object to access members of the class?

Accessing the members of the class (data and functions) is done using the dot (.) operator, which is also called as the member access operator. If obj is the name of the object and there is a function “display ()” in the class, then the function can be accessed as “obj. display ()”.

Which function is automatically called in C plus plus if we do not define it in the class?

A constructor in C++ is a special method that is automatically called when an object of a class is created.

Which of the following is a directive used to prevent a header file from accidentally being included more than once?

Another way to prevent a header file from being included more than once is with the ` #pragma once ' directive.