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Which component is essential in a rating and review system to prevent spam or fake reviews?

easy🧠 Conceptual Q2 of Q15
LLD - Design — Food Delivery System
Which component is essential in a rating and review system to prevent spam or fake reviews?
AUser authentication and verification
BFaster database indexing
CMore product images
DUnlimited review length
Step-by-Step Solution
Solution:

  1. Step 1: Identify how to ensure review authenticity

    Spam and fake reviews are reduced by confirming user identity.

  2. Step 2: Recognize the role of authentication

    User authentication verifies that reviews come from real users.

  3. Final Answer:

    User authentication and verification -> Option A

  4. Quick Check:

    Spam prevention = User authentication [OK]
Quick Trick: Verify users to keep reviews trustworthy [OK]
Common Mistakes:
MISTAKES
  • Confusing database speed with spam control
  • Thinking more images reduce fake reviews
  • Believing longer reviews prevent spam

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