Interview

Interview questions

Short questions on observability for data systems, such as metrics, logs and traces, freshness and lag, alerting and error budgets, canaries and capacity, and safe data deploys, each with an answer you could give aloud and a link to the full explanation.

Scenarios

Longer problems on observability for data systems, of the kind asked in senior interviews: each one estimated with numbers, diagnosed, and answered with its trade-offs.