Python interview questions and answers: Object-Oriented Programming

Python: Classes, Objects, Constructors

Classes and Objects:

• What is a Python class? Define a class with an example
• Explain the purpose of the self parameter in Python class methods.
• What are Python objects, and how are they created?
• Explain the difference between a class and an object in Python?

Constructors and Destructors:

• What is a constructor in Python?
• How do you define a constructor in a Python class?
• When is the constructor called during object creation in Python?
• What is a destructor in Python?
• In a Python class, how do you define a destructor?

Instance and Class Variables:

• What are instance variables in Python classes?
• How do you define instance variables in a Python class?
• What is the scope of instance variables?
• How to access instance variables within Python class methods?
• What are Python class variables?
• What is the scope of class variables?

Inheritance and Polymorphism:

• What is inheritance in Python object-oriented programming?
• How to create a subclass (derived class) from a superclass (base class) in Python?
• Explain the concept of Python method overriding in inheritance.
• What is method overloading in Python?
• How is polymorphism achieved in Python?

Encapsulation and Abstraction:

• What is encapsulation in OOP?
• How does encapsulation provide data hiding in Python?
• How do you create private attributes in a Python class?
• What is abstraction in OOP (Python)?
• How do you achieve abstraction using abstract classes or interfaces in Python?
• Describe the difference between encapsulation and abstraction in Python.