Mid-level interview question
Quality dropped after a canary rollout. How do you find what broke?
Model answer
Break the metric down: by release on the same days, then by query type. In the course's synthetic incident, only how-to questions on the new release got worse, 3% to 12% thumbs-down. Then read traces of affected requests to find the failing step: there, retrieval returned a chunk cut off mid-procedure.
Practise the rest
6 Observability questions, 492 in all, each with a model answer. Free.