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System Design Quiz Practice
Active Recall Drill Session
← Exit Session
Question 1 of 1
medium
System Design
Why is monitoring queue depth (backlog size) important, separate from consumer error rate?
A
It isn't important, error rate alone is sufficient
B
A growing backlog with a healthy, error-free consumer usually means the consumer is falling behind producer volume — a distinct problem from consumer failures
C
Queue depth and error rate always move together
D
Queue depth only matters for pub/sub, not point-to-point queues
Check Answer