Object-Oriented Programming Interview Questions | Python | NextRound

1How would you make a custom class usable in a for loop?Intermediate

2How do __enter__ and __exit__ work together to implement the context manager protocol?Advanced

3How does Python implement inheritance, and what is the Method Resolution Order (MRO)?Advanced

4What are dataclasses, and how do they reduce boilerplate compared to manually writing __init__, __eq__, and __repr__?Intermediate

5What is the @property decorator, and what problem does it solve compared to plain getter/setter methods?Intermediate

6What is the difference between method overriding and method overloading, and why doesn't Python natively support overloading?Intermediate

7What problem does the diamond inheritance pattern cause, and how does Python's MRO resolve it?Advanced

8What is the difference between a class and an instance in Python?Beginner

9How does Python implement encapsulation given that it has no true 'private' access modifiers?Intermediate

10What is the purpose of self in instance methods, and why must it be explicitly declared in Python?Beginner

11What is the difference between __str__ and __repr__, and what convention should __repr__ follow?Intermediate

12What is a metaclass, and what is type's relationship to every class in Python?Advanced

13What is the purpose of __eq__ and __hash__, and why must they be implemented consistently?Advanced

14What is a descriptor, and how do @property and ORMs like Django's models rely on the descriptor protocol?Advanced

15What is the difference between an instance method, a class method, and a static method?Intermediate

16What is composition, and why is 'favor composition over inheritance' often recommended?Advanced

17What are dunder (magic) methods, and how do they enable operator overloading?Intermediate

18When would you use a metaclass instead of a class decorator or __init_subclass__?Advanced

19How do abstract base classes (abc.ABC) enforce interface contracts in Python?Advanced