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How can you combine move validation with user authentication to improve security in a system?

hard📝 Trade-off Q9 of Q15
LLD - Design — Tic-Tac-Toe Game
How can you combine move validation with user authentication to improve security in a system?
AValidate moves before checking user authentication
BAuthenticate users only after move validation
CSkip validation if user is authenticated
DValidate moves only after confirming the user's identity and permissions
Step-by-Step Solution
Solution:

  1. Step 1: Understand security flow

    Authentication confirms user identity before allowing actions.

  2. Step 2: Combine authentication with validation

    Validating moves only after authentication ensures only authorized users make moves.

  3. Final Answer:

    Validate moves only after confirming the user's identity and permissions -> Option D

  4. Quick Check:

    Authenticate before validating moves for security [OK]
Quick Trick: Authenticate user before validating moves [OK]
Common Mistakes:
MISTAKES
  • Validating moves without authentication
  • Skipping validation for authenticated users
  • Authenticating after move validation

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