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What is a Django signal used for?

  1. A Sending push notifications
  2. B Allowing decoupled applications to react to events such as post_save
  3. C Logging HTTP requests
  4. D Managing sessions
Answer

Allowing decoupled applications to react to events such as post_save

Signals decouple senders from receivers, but they make control flow harder to follow. Explicit calls are often clearer where the code is under your control.

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