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What is an Angular signal?

  1. A A DOM event wrapper
  2. B A reactive value wrapper that tracks its readers and notifies them on change
  3. C A routing mechanism
  4. D A form validator
Answer

A reactive value wrapper that tracks its readers and notifies them on change

Signals enable fine-grained updates without subscriptions, and are the foundation of Angular's move towards zoneless change detection.

All Angular MCQs

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