You manage a microservice that provides a public-facing API (Service A). Service A is time- critical and has a response SLO of 500 ms. Service A makes synchronous calls to internal API (Service B)…

Question

Options

• AIncrease the size of the queue in front of the thread pool used by Service A instances.
• BImplement retry logic with exponential back-offs when calling Service B.
• CImplement a circuit breaker to store the request data in a database.
• DImplement rate limiting in Service A to limit the number of requests to Service B.

• A
  3% (2)
• B
  10% (7)
• C
  84% (56)
• D
  3% (2)

Explanation

A circuit breaker helps prevent cascading failures by short-circuiting calls to a failing service (Service B) and avoiding unnecessary latency. Storing request data in a database ensures that critical user-facing operations in Service A continue unaffected and the data can be processed later. This approach preserves the 500 ms SLO while decoupling Service A from Service B's

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