🌐 Python Web Frameworks

Master Flask, Django, and FastAPI with questions on REST APIs, ORM, and authentication

Flask, Django, FastAPI - building REST APIs and web applications

Compare Flask, Django, and FastAPI frameworks

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Flask is a lightweight microframework, Django is a full-featured batteries-included framework, and FastAPI is a modern async framework with automatic API documentation.

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Feature	Flask	Django	FastAPI
Type	Microframework	Full-stack	Modern API
Async Support	Limited	Django 3.1+	Native
ORM	SQLAlchemy	Built-in	SQLAlchemy/Tortoise
API Docs	Manual	Manual/DRF	Auto (OpenAPI)
Best For	Small apps, APIs	Full websites	APIs, microservices

How do you build REST APIs with Flask?

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Explain Django ORM and common patterns

Hard

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How does FastAPI handle async and dependency injection?

Hard

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How do you implement authentication in Django?

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How do you handle file uploads in Flask and Django?

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How do you implement caching in Python web frameworks?

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Explain middleware patterns in Python web frameworks

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How do you structure large Flask and FastAPI applications?

Hard

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Web Frameworks Interview Tips

✓ Know when to choose Flask vs Django vs FastAPI
✓ Understand Django ORM query optimization (select_related, prefetch_related)
✓ Be familiar with FastAPI dependency injection and async patterns
✓ Know how to implement authentication (JWT, session-based)
✓ Understand middleware patterns across frameworks
✓ Be prepared to discuss caching strategies (Redis, Memcached)
✓ Know how to structure large applications (blueprints, routers)
✓ Understand RESTful API best practices and versioning