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Practice
79 questions- DebuggingAn API endpoint started returning 503s only at peak traffic in one of three regions. Walk me through how you investigate.
- DebuggingA nightly batch job has been silently producing duplicate rows for the last three nights. Where do you look first?
- DebuggingA user reports that their cart 'sometimes' empties between page loads. You can't reproduce it. Walk me through your approach.
- DebuggingA service's p99 latency spiked from 80ms to 600ms after a deploy that 'changed nothing relevant.' What's your investigation path?
- DebuggingA queue worker is processing messages but the queue depth keeps growing. Walk me through what you check.
- DebuggingYour service is healthy on every dashboard, but customers report errors. How do you bridge the gap?