Reliability
38 practice items · needed by 10 roles
Easy 5Medium 10Hard 23
Practice questions
- Errors during every deploymedium
- Liveness probe restarts every podmedium
- Retrying after a shared outagemedium
- What a circuit breaker doesmedium
- One bad message blocks the queuemedium
- Retries stacked at every layerhard
- Work continues after the client gives uphard
- Preventing double charges on retryhard
- Saving data and publishing an eventhard
- What a watchdog doeseasy
- Why enable brown-out reseteasy
- Feeding the watchdog with an RTOSmedium
- Bricked devices after an updatehard
- A CAN node goes silenthard
- Flash wearing out in a weekhard
- Settings lost on power cuthard
- Node drain hangs forevermedium
- Policy webhook takes down deployshard
- Running workloads on spothard
- Outage that will not endhard
- All replicas landed in one zonehard
- Service collapses again after recoveryhard
- Liveness probe makes an outage worsehard
- What a hallucination iseasy
- Handling an HTTP 429 responseeasy
- Getting reliable JSON outputmedium
- Why add jitter to backoffmedium
- Tracing a retry helpermedium
- Agent stuck in a loophard
- One failure in Promise.allhard
- Retries that make an outage worsehard
- Error budget for 99.9%hard
- Idempotent pipelineseasy
- Exactly-once end to endhard
- Safe backfillshard
- A test that fails one in ten runshard
- Handling flaky tests at scalehard
- Noisy screenshot comparisonshard