A Python developer interview typically assesses a candidate's proficiency in Python programming and their ability to apply it in real-world software development. Here's an overview of what to expect:
1. Interview Stages
a. Screening/Phone Interview (30–45 min):
Focus on background, experience, and technical knowledge.
May include basic Python questions (e.g., list comprehensions, data types, functions).
b. Technical Interview (1–2 rounds):
Live coding exercises using platforms like CoderPad or HackerRank.
Questions on:
Data structures & algorithms (e.g., sorting, recursion, trees, graphs).
Python-specific features (e.g., decorators, generators, context managers).
OOP principles and design patterns in Python.
Error handling and testing (e.g., unittest, pytest).
c. System Design/Architecture Round (for senior roles):
High-level design of scalable systems.
APIs, database schema, caching, microservices, etc.
d. Behavioral/Cultural Fit Interview:
Communication, teamwork, problem-solving approach.
Past project experience and role in team environments.
2. Common Technical Topics
Core Python: Variables, control flow, functions, classes, modules.
Advanced Python: Iterators, generators, decorators, metaclasses.
Data Structures: Lists, dicts, sets, tuples, stacks, queues, trees.
Libraries/Frameworks: Flask/Django (web), Pandas/Numpy (data), Requests, SQLAlchemy.
APIs & Web Development: REST principles, JSON, authentication.
Testing: Writing and debugging unit tests.
Database Knowledge: SQL, ORMs, indexing, transactions.
3. Sample Interview Questions
Explain Python's GIL and how it affects threading.
Implement a cache using a decorator.
What’s the difference between is and ==?
How would you design a rate limiter for an API?