REST API serving with FastAPI in MLOps - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is FastAPI used for in REST API serving?

FastAPI is a modern, fast web framework for building REST APIs with Python. It helps create APIs quickly with automatic data validation and documentation.

intermediate

How does FastAPI handle data validation?

FastAPI uses Python type hints and Pydantic models to automatically validate and convert incoming request data, ensuring the API receives the correct data types.

beginner

What command starts a FastAPI server using Uvicorn?

The command is: uvicorn main:app --reload. Here, 'main' is the Python file name and 'app' is the FastAPI instance. '--reload' restarts the server on code changes.

intermediate

Why is automatic API documentation useful in FastAPI?

FastAPI generates interactive API docs (Swagger UI and ReDoc) automatically, making it easy to test and understand API endpoints without extra setup.

beginner

What is the role of path operation functions in FastAPI?

Path operation functions define how the API responds to HTTP requests at specific paths and methods (GET, POST, etc.). They contain the logic for each API endpoint.

Which Python library does FastAPI use for data validation?

A Pydantic

B NumPy

C Requests

D Flask

FastAPI uses Pydantic to validate and parse data automatically based on Python type hints.

What does the '--reload' option do when running Uvicorn with FastAPI?

A Restarts the server on code changes

B Enables debug mode

C Runs the server in production mode

D Disables logging

The '--reload' option makes the server restart automatically when code changes, useful during development.

Which HTTP method is used to retrieve data in a REST API?

A POST

B DELETE

C PUT

D GET

GET requests are used to retrieve data from a REST API.

What is the default port Uvicorn uses when starting a FastAPI app?

A 5000

B 8000

C 8080

D 3000

Uvicorn defaults to port 8000 when starting a FastAPI server.

Which feature of FastAPI helps generate interactive API docs automatically?

A Flask Admin

B Django REST Framework

C Swagger UI

D Jinja2

FastAPI integrates Swagger UI to provide interactive API documentation automatically.

Explain how FastAPI uses Python type hints and Pydantic models to serve REST APIs.

Think about how FastAPI checks incoming data before running your code.

Describe the steps to start a FastAPI server and test an endpoint.

Focus on writing code, running server, and checking API docs.