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What is the main purpose of the Observer pattern in UI updates?

easy🧠 Conceptual Q11 of Q15
LLD - Design — Chess Game
What is the main purpose of the Observer pattern in UI updates?
ATo improve database query speed
BTo store user data securely
CTo automatically update UI components when data changes
DTo handle user authentication
Step-by-Step Solution
Solution:

  1. Step 1: Understand the Observer pattern role

    The Observer pattern connects data changes to UI updates automatically.

  2. Step 2: Match purpose with options

    Only To automatically update UI components when data changes describes automatic UI updates on data change.

  3. Final Answer:

    To automatically update UI components when data changes -> Option C

  4. Quick Check:

    Observer pattern = automatic UI update [OK]
Quick Trick: Observer pattern links data changes to UI updates [OK]
Common Mistakes:
MISTAKES
  • Confusing Observer with data storage
  • Thinking it improves database speed
  • Mixing with authentication logic

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