AZ400-Q: diagnose a slow distributed request
A user reports that checkout is slow. The request calls several services and a database. The team needs to identify which dependency dominates latency for the affected operation. What should it use first?
- A) Azure Policy compliance results.
- B) A Git branch comparison.
- C) Application Insights distributed tracing and dependency telemetry, queried or inspected for the request correlation. ✓
- D) A storage account access key.
Answer: C. Distributed traces and dependency telemetry connect the request with downstream calls, durations, failures, and correlation identifiers.
Why not the others: Policy and Git answer governance/source questions. A storage key is a credential, not performance evidence.