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Why is it important to manage Observable subscriptions carefully in Angular component lifecycle?

hard🧠 Conceptual Q10 of 15
Angular - RxJS and Observables Fundamentals
Why is it important to manage Observable subscriptions carefully in Angular component lifecycle?
ABecause Angular automatically unsubscribes all Observables
BTo avoid memory leaks and unexpected behavior after component destruction
CTo ensure Observables emit only once per component
DBecause subscriptions slow down component initialization
Step-by-Step Solution
Solution:

  1. Step 1: Understand subscription impact

    Active subscriptions keep resources and callbacks alive even if component is destroyed.

  2. Step 2: Consequences of poor management

    Not unsubscribing causes memory leaks and can trigger code unexpectedly after component removal.

  3. Final Answer:

    To avoid memory leaks and unexpected behavior after component destruction -> Option B

  4. Quick Check:

    Subscription management importance = B [OK]
Quick Trick: Manage subscriptions to prevent leaks and bugs after destroy [OK]
Common Mistakes:
MISTAKES
  • Assuming Angular auto-unsubscribes
  • Thinking subscriptions emit only once
  • Believing subscriptions slow initialization

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