FastAPI Interview Questions & Assessment
Evaluate FastAPI skills including path operations, dependency injection, Pydantic models, async endpoints, and OpenAPI integration.
Why FastAPI Matters
FastAPI is the fastest-growing Python framework, known for its speed (on par with Node.js/Go) and automatic API documentation. Companies like Microsoft, Uber, and Netflix use it for high-performance APIs.
Sample Interview Questions
How does FastAPI's dependency injection system work? How does it differ from Flask?
Explain Pydantic models in FastAPI. How does validation work?
When should you use async def vs def for FastAPI path operations?
How would you implement authentication with OAuth2 and JWT in FastAPI?
Design a FastAPI middleware for request logging and rate limiting.
How to Prepare
Understand async/await in Python and when it helps in FastAPI
Master Pydantic V2 for data validation and serialization
Know FastAPI's dependency injection and how to build reusable dependencies
Practice building CRUD APIs with SQLAlchemy and async database access
Understand the automatic OpenAPI/Swagger documentation generation
Related Skills
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