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If a service coordination test fails because Service B does not receive updates from Service A, what is the most probable cause?

medium📝 Analysis Q6 of 15
LLD - Design — Food Delivery System
If a service coordination test fails because Service B does not receive updates from Service A, what is the most probable cause?
AService B is processing updates too quickly
BNetwork connectivity issues between Service A and Service B
CService A is sending duplicate updates
DService B has outdated package information
Step-by-Step Solution
Solution:

  1. Step 1: Identify failure symptom

    Service B never receives updates from Service A.

  2. Step 2: Analyze possible causes

    Network issues are the most common cause preventing message delivery.

  3. Final Answer:

    Network connectivity issues between Service A and Service B -> Option B

  4. Quick Check:

    No updates received usually means network failure [OK]
Quick Trick: No updates received? Check network first [OK]
Common Mistakes:
  • Assuming processing speed causes missing updates
  • Confusing duplicate sends with missing sends
  • Blaming outdated info without checking connectivity

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