object-oriented-programming-quiz

Object Oriented Programming Quiz

by Jarret JohnstonPublished: May 3, 2026

Step into the world of Object Oriented Programming, where classes and objects form the backbone of modern software development. This quiz will challenge your grasp of OOP concepts, from inheritance and polymorphism to encapsulation and abstraction. Ready to prove your expertise? Let’s get started!
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Object Oriented Programming Quiz
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1. What is the main purpose of encapsulation in OOP?
Encapsulation is one of the four fundamental OOP concepts.

Object Oriented Programming Quiz Questions Overview

1. What is the main purpose of encapsulation in OOP?

To hide the implementation details of a class
To allow multiple classes to inherit from a single class
To create a blueprint for objects
To enable a class to have multiple forms

2. Which of the following is a feature of polymorphism?

Method overloading
Method overriding
Both A and B
None of the above

3. What does the ‘this’ keyword refer to in Java?

The current object
The parent class
A static method
A local variable

4. Which of the following is NOT a principle of OOP?

Encapsulation
Abstraction
Inheritance
Compilation

5. In C++, which operator is used to access members of a class through a pointer?

->
.
&
*

6. What is a constructor in OOP?

A method that initializes an object’s state
A method that is called when an object is destroyed
A method that defines the behavior of an object
A method that is used to call another method

7. What is the term for a class that cannot be instantiated?

Abstract class
Concrete class
Static class
Final class

8. Which of the following best describes inheritance?

A class acquiring properties and behaviors of another class
A class hiding its implementation details
A class having multiple forms
A class defining a blueprint for objects

9. What is the purpose of the ‘super’ keyword in Java?

To refer to the superclass of the current object
To create a new instance of the superclass
To override a method in the superclass
To hide the implementation details of a class

10. Which of the following is true about an interface in Java?

An interface can have default methods
An interface can be instantiated
An interface can have instance variables
An interface can extend a class

11. What is the term for the ability of different objects to respond to the same method call in different ways?

Polymorphism
Encapsulation
Inheritance
Abstraction
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