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What does the Angular async pipe do when used in a template?

easy🧠 Conceptual Q1 of 15
Angular - RxJS and Observables Fundamentals
What does the Angular async pipe do when used in a template?
AAutomatically subscribes to an Observable or Promise and returns the latest value
BConverts a synchronous value into an Observable
CManually unsubscribes from an Observable when the component is destroyed
DTransforms a string to uppercase in the template
Step-by-Step Solution
Solution:
  1. Step 1: Understand the role of async pipe

    The async pipe automatically subscribes to Observables or Promises in the template.
  2. Step 2: Recognize its behavior

    It returns the latest emitted value and unsubscribes automatically when the component is destroyed.
  3. Final Answer:

    Automatically subscribes to an Observable or Promise and returns the latest value -> Option A
  4. Quick Check:

    Async pipe behavior = Automatically subscribes and unwraps [OK]
Quick Trick: Async pipe auto subscribes and unsubscribes for you [OK]
Common Mistakes:
MISTAKES
  • Thinking async pipe converts values to Observables
  • Believing async pipe manually unsubscribes in code
  • Confusing async pipe with string transformation pipes

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