OOPs Concepts in Python — Python Technical Interview Questions & Answers

OOPs Concepts in Python

OOPs Concepts in Python

  • OOP means you model the program with classes and objects. Class is the blueprint: Student. Object is one student: s = Student("Asha", 12). Encapsulation keeps data with the methods that use it. Inheritance lets Child reuse Parent. Polymorphism: same method name, different behaviour. Abstraction: show pay() hide the messy steps inside.
  • Fresher viva: define class vs object, then the four pillars in school English. One everyday word each — Student, BankAccount, Animal/Dog, Shape/Circle. Don’t start with UML.
  • OOPs Concepts in Python — output: 150. Start 100 + deposit 50. balance lives on the object.

Technical Interview Tip: Pillars with one everyday example each.

Code Examples for OOPs Concepts in Python

Example

# OOP
class Account:
    def __init__(self, start):
        self.balance = start
    def deposit(self, amt):
        if amt > 0:
            self.balance += amt

a = Account(100)
a.deposit(50)
print(a.balance)

OOPs Concepts in Python — output: 150. Start 100 + deposit 50. balance lives on the object.

How to Explain OOPs Concepts in Python to an Interviewer

Explain OOPs Concepts as if you are teaching a junior — definition, then one tiny script.

Class vs object Inheritance / encapsulation

What does the example print, and why?

OOPs Concepts in Python — output: 150

What mistake do freshers make with OOPs Concepts?

Polymorphism / abstraction