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Why is it important for a move validation system to be idempotent in distributed environments?

hard🧠 Conceptual Q10 of 15
LLD - Design — Tic-Tac-Toe Game
Why is it important for a move validation system to be idempotent in distributed environments?
ATo ensure repeated move requests do not cause inconsistent game states
BTo speed up move processing by skipping checks
CTo allow multiple different moves at the same time
DTo store moves in multiple databases
Step-by-Step Solution
Solution:

  1. Step 1: Understand idempotency in distributed systems

    Idempotency means repeated requests have the same effect as one.

  2. Step 2: Apply to move validation

    This prevents inconsistent states if the same move request is processed multiple times.

  3. Final Answer:

    To ensure repeated move requests do not cause inconsistent game states -> Option A

  4. Quick Check:

    Idempotency prevents inconsistent states from repeats [OK]
Quick Trick: Idempotent validation avoids duplicate state changes [OK]
Common Mistakes:
MISTAKES
  • Confusing idempotency with speed
  • Allowing multiple moves simultaneously
  • Thinking idempotency is about storage only

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