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Fastapi Interview Questions · IT Interview Practice
Home
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#Fastapi
#Fastapi
26 questions
What is FastAPI and why is it popular?
FastAPI
#framework
Junior
›
How do you define routes (path operations)?
FastAPI
#framework
Junior
›
How do path and query parameters work?
FastAPI
#framework
Junior
›
What are Pydantic models in FastAPI?
FastAPI
#validation
Junior
›
How do you receive a JSON request body?
FastAPI
#framework
Junior
›
What is response_model for?
FastAPI
#framework
Junior
›
How does FastAPI generate automatic documentation?
FastAPI
#framework
Junior
›
When should you use async def vs def for endpoints?
FastAPI
#async
Junior
›
How do you set status codes and headers?
FastAPI
#framework
Junior
›
How do you add validation constraints to parameters?
FastAPI
#validation
Junior
›
How does dependency injection (Depends) work?
FastAPI
#di
Middle
›
How do you write custom validation in Pydantic?
FastAPI
#validation
Middle
›
How do you handle errors and raise HTTP exceptions?
FastAPI
#error-handling
Middle
›
How does middleware work in FastAPI?
FastAPI
#framework
Middle
›
How do BackgroundTasks work?
FastAPI
#framework
Middle
›
How do you structure a large app with APIRouter?
FastAPI
#framework
Middle
›
How do you handle form data and file uploads?
FastAPI
#framework
Middle
›
How do you integrate a SQL database with FastAPI?
FastAPI
#data
Middle
›
How do you manage settings with Pydantic?
FastAPI
#framework
Middle
›
How do you handle WebSockets in FastAPI?
FastAPI
#framework
Senior
›
How do you run robust background jobs (Celery/ARQ)?
FastAPI
#architecture
Senior
›
How do you deploy a FastAPI app to production?
FastAPI
#architecture
Senior
›
How do you model nested and complex request bodies?
FastAPI
#validation
Middle
›
What response types can you return beyond JSON?
FastAPI
#framework
Middle
›
What advanced dependency patterns does FastAPI support?
FastAPI
#di
Senior
›
What changed in Pydantic v2 and why does it matter for FastAPI?
FastAPI
#validation
Senior
›