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Welcome to the Constructors and Destructors MCQs Page

Dive deep into the fascinating world of Constructors and Destructors with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Constructors and Destructors, a crucial aspect of Object Oriented Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Constructors and Destructors, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Object Oriented Programming.

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Check out the MCQs below to embark on an enriching journey through Constructors and Destructors. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Object Oriented Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Constructors and Destructors. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Constructors and Destructors MCQs | Page 3 of 9

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Q21.
Which type of constructor can’t have a return type?

a.

Default

b.

Parameterized

c.

Copy

d.

Constructors don’t have a return type

Discuss
Answer: (d).Constructors don’t have a return type
Q22.
Why do we use static constructors?

a.

To initialize the static members of class

b.

To initialize all the members with static value

c.

To delete the static members when not required

d.

To clear all the static members initialized values

Discuss
Answer: (a).To initialize the static members of class
Q23.
When and how many times a static constructor is called?

a.

Created at time of object destruction

b.

Called at first time when an object is created and only one time

c.

Called at first time when an object is created and called with every new object creation

d.

Called whenever an object go out of scope

Discuss
Answer: (b).Called at first time when an object is created and only one time
Q24.
Which among the following is true for static constructor?

a.

Static constructors are called with every new object

b.

Static constructors are used initialize data members to zero always

c.

Static constructors can’t be parameterized constructors

d.

Static constructors can be used to initialize the non-static members also

Discuss
Answer: (c).Static constructors can’t be parameterized constructors
Q25.
Within a class, only one static constructor can be created.

a.

True

b.

False

c.

May be

d.

Can't say

Discuss
Answer: (a).True
Q26.
Default constructor initializes all data members as:

a.

All numeric member with some garbage values and string to random string

b.

All numeric member with some garbage values and string to null

c.

All numeric member with zero and strings to random value

d.

All numeric member with zero and strings to null

Discuss
Answer: (d).All numeric member with zero and strings to null
Q27.
When is the static constructor called?

a.

After the first instance is created

b.

Before default constructor call of first instance

c.

Before first instance is created

d.

At time of creation of first instance

Discuss
Answer: (c).Before first instance is created
Q28.
If constructors of a class are defined in private access, then:

a.

The class can’t be inherited

b.

The class can be inherited

c.

Instance can be created only in another class

d.

Instance can be created anywhere in the program

Discuss
Answer: (a).The class can’t be inherited
Q29.
Which among the following is correct, based on the given code below: 
class student
{ 
 int marks;
 public : student()
 {  
  cout<<”New student details can be added now”;
 }
};
student s1;

a.

Cout can’t be used inside the constructor

b.

Constructor must contain only initializations

c.

This program works fine

d.

This program produces errors

Discuss
Answer: (c).This program works fine
Q30.
Copy constructor is a constructor which ________________

a.

Creates an object by copying values from any other object of same class

b.

Creates an object by copying values from first object created for that class

c.

Creates an object by copying values from another object of another class

d.

Creates an object by initializing it with another previously created object of same class

Discuss
Answer: (d).Creates an object by initializing it with another previously created object of same class
Page 3 of 9

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