Question 1

What does encapsulation in Object Oriented Programming primarily aim to achieve?

Accepted Answer

Data Hiding

Answer

Dynamic Binding

Answer

Code Reusability

Answer

Method Overloading

Question 2

What is polymorphism in Object Oriented Programming?

Accepted Answer

The ability to treat objects of different classes as objects of a common superclass

Answer

A technique for variable scope

Answer

The process of combining multiple classes

Answer

The ability to override any method

Question 3

Which of the following best describes inheritance in Object Oriented Programming?

Accepted Answer

A mechanism for a new class to inherit properties and behavior from an existing class

Answer

A method to hide data within a class

Answer

A way to define a class without properties

Answer

A technique for executing functions in sequence

Question 4

What is an abstract class in Object Oriented Programming?

Accepted Answer

A class that cannot be instantiated and may contain abstract methods

Answer

A class with no methods

Answer

A concrete implementation of a class

Answer

A class that can be instantiated but has no properties

Question 5

What is the primary purpose of a constructor in a class?

Accepted Answer

To initialize objects of the class

Answer

To destroy objects of the class

Answer

To encapsulate data within the class

Answer

To define methods for the class

Question 6

Which of the following is an example of method overriding?

Accepted Answer

A subclass provides its own implementation of a method already defined in its superclass

Answer

A class creates multiple methods with the same name

Answer

A subclass implements additional methods unique to itself

Answer

A method calls another method within the same class

Question 7

Which of the following is NOT a core principle of Object Oriented Programming?

Accepted Answer

Procedural Programming

Answer

Encapsulation

Answer

Polymorphism

Answer

Inheritance

Question 8

What is the main advantage of using interfaces in Object Oriented Programming?

Accepted Answer

To define a contract that multiple classes can implement

Answer

To create a single class that cannot be inherited

Answer

To enhance the speed of class methods

Answer

To combine methods and attributes into a single class

Question 9

What is the purpose of the 'this' keyword in Object Oriented Programming?

Accepted Answer

To refer to the current instance of a class

Answer

To create a new instance of a class

Answer

To declare a static variable

Answer

To invoke a superclass method

Question 10

What does it mean when a class is described as 'sealed' in some Object Oriented Programming languages?

Accepted Answer

No other class can inherit from a sealed class

Answer

The class can only have a single instance

Answer

The class is abstract and cannot be instantiated

Answer

The class cannot contain methods

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