FastAPI Intermediate Quiz
Explore database integration, authentication, background tasks, WebSockets, and advanced validation
Start the quizSample questions from this quiz
A preview of the style and depth. Try each one, then reveal the answer — or skip straight to the timed quiz.
1. What is dependency injection in FastAPI?
- Injecting code dependencies
- Using Depends() to share logic and resources
- Reusable code across endpoints
- All of the above
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Answer: All of the above. Dependency injection in FastAPI uses Depends() to declare dependencies. It enables code reuse, shared logic, database connections, authentication, etc.
2. How do you define a dependency?
- Use dependency parameter
- Create a function and use Depends()
- Inherit from Dependency class
- Use @dependency decorator
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Answer: Create a function and use Depends(). Define a dependency as a function, then use it with Depends(): `def get_db(): ...; @app.get("/") def read(db = Depends(get_db)):`. FastAPI calls it automatically.
3. What is sub-dependency in FastAPI?
- Secondary dependencies
- Both b and c
- Dependencies that have their own dependencies
- Create dependency chains
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Answer: Both b and c. Sub-dependencies are dependencies that themselves have dependencies. FastAPI resolves the entire dependency tree automatically, creating chains of dependencies.
Frequently asked questions
How many questions are in this FastAPI quiz?+
30 questions, with a 60-minute time limit. Every question includes a written explanation of the correct answer.
Is this FastAPI quiz free?+
Yes. Every quiz on CodexQuizz is free and needs no account. You only enter a name if you choose to post your score to the leaderboard.
What level is the intermediate quiz aimed at?+
Explore database integration, authentication, background tasks, WebSockets, and advanced validation
Can I use this to prepare for a FastAPI interview?+
Yes. The questions cover the topics that come up in FastAPI technical screens, and the explanations are written so that a wrong answer still teaches you the underlying concept.
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