KCNA Cloud Native Architecture Practice Question
Which of the following is a resiliency pattern that limits the number of concurrent requests to a service to prevent overload?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Bulkhead
Bulkhead isolates resources into pools (e.g., thread pools) so that a failure in one pool does not cascade. Circuit breaker stops calls after failures, retry repeats failed calls, and timeout limits wait time.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Retry
Why it's wrong here
Retry re-sends failed requests, not limit concurrency.
- ✗
Timeout
Why it's wrong here
Timeout cancels a request if it takes too long, but does not limit concurrency.
- ✓
Bulkhead
Why this is correct
Bulkhead pattern isolates different parts of a system into separate pools to prevent failure propagation and limit concurrency.
- ✗
Circuit breaker
Why it's wrong here
Circuit breaker prevents repeated failures by opening the circuit, but does not limit concurrent requests.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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