AZ400-Q: trace a failed request across services
A request fails after passing through three services. What telemetry design makes root-cause analysis practical?
- A) Propagate a correlation identifier and emit structured, linked traces, dependencies, and exceptions. ✓
- B) Log only a generic success message.
- C) Keep logs on individual developer laptops.
- D) Sample every error out of existence. Answer: A. Correlated telemetry reconstructs one request’s path across components. Why not the others: Generic, local, or discarded evidence prevents diagnosis.