Learning Object-Oriented Programming (OOP) introduces a paradigm that organizes software design around objects, representing real-world entities.

It’s a fundamental approach used in modern programming languages like Java, Python, and C++.

OOP fosters a modular, reusable, and scalable codebase by encapsulating data and functions into objects, enabling easier maintenance and modification.

Its key advantages lie in encapsulation, which restricts access to certain components, inheritance, facilitating code reuse and extension, and polymorphism, allowing objects to be treated as instances of their parent class.

This approach enhances code readability, reduces complexity, promotes code organization, and supports easier maintenance through the separation of concerns, making it a cornerstone for building robust, efficient, and maintainable software systems.

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here are 20 multiple-choice questions (MCQs) on Object-Oriented Programming along with their respective answers:

What does OOP stand for?

A) Object-Oriented Protocol
B) Object-Oriented Programming
C) Object-Oriented Process
D) Object-Oriented Procedure
Answer: B) Object-Oriented Programming
Which of the following is NOT a principle of OOP?

A) Encapsulation
B) Inheritance
C) Abstraction
D) Segmentation
Answer: D) Segmentation
Which OOP concept refers to the ability of a class to have multiple methods with the same name but different parameters?

A) Inheritance
B) Polymorphism
C) Encapsulation
D) Abstraction
Answer: B) Polymorphism
Which feature of OOP prevents data from being accessed by the code outside of a class?

A) Polymorphism
B) Inheritance
C) Encapsulation
D) Abstraction
Answer: C) Encapsulation
In OOP, what is a class?

A) An instance of an object
B) A blueprint for creating objects
C) A variable that holds data
D) A method for encapsulation
Answer: B) A blueprint for creating objects
What is the process of creating a new object from a class called?

A) Instantiation
B) Encapsulation
C) Inheritance
D) Abstraction
Answer: A) Instantiation
Which keyword is used in Java to inherit a class?

A) this
B) extends
C) inherit
D) super
Answer: B) extends
Which OOP concept allows a class to inherit properties and behavior from another class?

A) Abstraction
B) Encapsulation
C) Polymorphism
D) Inheritance
Answer: D) Inheritance
Which access specifier allows a variable or method to be accessed within the same class only?

A) public
B) private
C) protected
D) default
Answer: B) private
Which OOP concept emphasizes hiding the internal implementation details of objects and only exposing necessary functionalities?

A) Encapsulation
B) Inheritance
C) Polymorphism
D) Abstraction
Answer: D) Abstraction
Which method is automatically called when an object is created?

A) start()
B) run()
C) init()
D) constructor()
Answer: D) constructor()
Which OOP principle allows a class to implement multiple interfaces?

A) Encapsulation
B) Polymorphism
C) Inheritance
D) Interface Segregation
Answer: C) Inheritance
In OOP, what is method overloading?

A) Providing multiple implementations of a method in the same class
B) Creating multiple methods with the same name but different parameters in the same class
C) Using methods from another class
D) Restricting access to certain methods
Answer: B) Creating multiple methods with the same name but different parameters in the same class
Which keyword is used to refer to the current object within a class method in Java?

A) this
B) super
C) self
D) object
Answer: A) this
What is the process of combining data and methods into a single unit known as in OOP?

A) Inheritance
B) Encapsulation
C) Abstraction
D) Polymorphism
Answer: B) Encapsulation
Which OOP principle states that a subclass can define its unique behavior while inheriting from a superclass?

A) Encapsulation
B) Polymorphism
C) Abstraction
D) Liskov Substitution Principle
Answer: B) Polymorphism
Which OOP feature allows a class to have more than one method having the same name but different parameters?

A) Method Overloading
B) Method Overriding
C) Multiple Inheritance
D) Constructor Overloading
Answer: A) Method Overloading
What is the purpose of the ‘super’ keyword in Java?

A) To access superclass methods and constructors
B) To create a new instance of a class
C) To initialize a variable
D) To refer to the current object
Answer: A) To access superclass methods and constructors
Which OOP concept allows a class to take on multiple forms?

A) Inheritance
B) Abstraction
C) Polymorphism
D) Encapsulation
Answer: C) Polymorphism
Which term refers to the ability of an object to take on many forms?

A) Encapsulation
B) Inheritance
C) Polymorphism
D) Abstraction
Answer: C) Polymorphism

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