Microservices - Advanced Patterns
Given a microservices system where Service A calls Service B 5 times and Service B calls Service C 3 times per user request, what is the total number of service calls triggered by one user request?
Given a microservices system where Service A calls Service B 5 times and Service B calls Service C 3 times per user request, what is the total number of service calls triggered by one user request?
medium📝 Analysis Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Calculate calls from Service A to B
Service A calls Service B 5 times per request.Step 2: Calculate calls from Service B to C triggered by A's calls
Each of the 5 calls from A causes 3 calls from B to C, so 5 * 3 = 15 calls.Step 3: Sum all calls
Total calls = 5 (A->B) + 15 (B->C) = 20 calls.Final Answer:
20 -> Option AQuick Check:
5 + (5*3) = 20 [OK]
Quick Trick: Multiply nested calls, then add all [OK]
Common Mistakes:
- Adding 5 + 3 instead of multiplying
- Ignoring nested calls from B to C
- Choosing sum as 18 instead of 20
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