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Why is service-based state management preferred over component-local state for large Angular apps?

hard📝 Conceptual Q10 of 15
Angular - State Management
Why is service-based state management preferred over component-local state for large Angular apps?
ABecause services provide a single source of truth shared across components
BBecause component-local state is faster and more reliable
CBecause services automatically update the UI without subscriptions
DBecause component-local state cannot hold any data
Step-by-Step Solution
Solution:

  1. Step 1: Understand single source of truth concept

    Services centralize state, avoiding duplication and inconsistency.

  2. Step 2: Contrast with component-local state

    Component-local state is isolated and can cause data mismatch in large apps.

  3. Final Answer:

    Because services provide a single source of truth shared across components -> Option A

  4. Quick Check:

    Service state = single source of truth [OK]
Quick Trick: Services centralize shared state for consistency [OK]
Common Mistakes:
  • Believing component state is always better
  • Thinking services update UI automatically without subscriptions
  • Assuming component state cannot hold data

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