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In a review system, users complain their reviews disappear after submission. What is the most probable bug?

medium📝 Analysis Q7 of Q15
LLD - Design — Food Delivery System
In a review system, users complain their reviews disappear after submission. What is the most probable bug?
AThe rating scale is incorrect
BThe review is not saved to the database after submission
CThe product has no images
DThe user interface is too slow
Step-by-Step Solution
Solution:

  1. Step 1: Analyze why reviews disappear

    If reviews vanish, likely they are not stored persistently.

  2. Step 2: Identify missing database save

    Check if the system saves review data after user submits.

  3. Final Answer:

    The review is not saved to the database after submission -> Option B

  4. Quick Check:

    Disappearing reviews = Not saved in DB [OK]
Quick Trick: Ensure reviews are saved to database after submission [OK]
Common Mistakes:
MISTAKES
  • Blaming UI speed for data loss
  • Confusing images with review storage
  • Thinking rating scale causes disappearance

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