DSA Studio

System Design Reliability Checkpoint

Work fresh traces, diagnose invalid implementations, and identify model boundaries.

Get every question correct to pass this checkpoint. You can review feedback, revise your answers, and submit again.

1. Two retrying layers each permit four total attempts. What is the maximum number of leaf attempts for one request?
2. A remote charge commits, but its response is lost. What should a bounded retry reuse?

Select one answer.

3. A queue receives 150 jobs/s, serves 120/s, and holds 90 jobs. From empty, how many seconds until full in the fluid model?
4. A half-open circuit breaker admits one probe, which fails. Under the lesson policy, what happens?

Select one answer.

5. Only 80 ms remain before a caller deadline, and 30 ms are reserved for returning the response. What is the maximum remaining dependency budget?

Select one answer.

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