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What is the main purpose of using Depends() in FastAPI for shared dependencies?

easy🧠 Conceptual Q11 of 15
FastAPI - Dependency Injection
What is the main purpose of using Depends() in FastAPI for shared dependencies?
ATo reuse code across multiple routes by declaring common dependencies
BTo create a new route in the application
CTo handle database connections manually
DTo define the response model for an endpoint
Step-by-Step Solution
Solution:

  1. Step 1: Understand the role of Depends()

    Depends() is used in FastAPI to declare dependencies that can be shared across multiple routes.

  2. Step 2: Identify the main benefit

    Using shared dependencies helps reuse code and keep the app clean and maintainable.

  3. Final Answer:

    To reuse code across multiple routes by declaring common dependencies -> Option A

  4. Quick Check:

    Shared dependencies = reuse code [OK]
Quick Trick: Depends() means shared code for many routes [OK]
Common Mistakes:
MISTAKES
  • Thinking Depends() creates routes
  • Confusing Depends() with response models
  • Assuming Depends() manages database connections directly

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