[Solved] Which scenario best describes when to use retry with exponential backoff in microservices? — Ans: When a service is temporarily unavailable due to high load | Microservices

Microservices - Resilience Patterns

Which scenario best describes when to use retry with exponential backoff in microservices?

AWhen a service permanently rejects a request due to invalid data

BWhen a service is temporarily unavailable due to high load

CWhen a service always returns success immediately

DWhen a service does not require any retries

Step-by-Step Solution

Solution:

Step 1: Identify retry use cases
Retry with exponential backoff is useful when failures are temporary, such as service overload or network issues.
Step 2: Match scenario to use case
When a service is temporarily unavailable due to high load describes temporary unavailability, which fits retry use. Options A, C, and D do not involve temporary failures suitable for retries.
Final Answer:
When a service is temporarily unavailable due to high load -> Option B
Quick Check:
Retry use case = Temporary failure [OK]

Quick Trick: Retry only for temporary failures, not permanent errors [OK]

Common Mistakes:

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