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Microsoft DevOps Engineer Expert AZ-400 Practice Question

You run load tests against an Azure App Service that is instrumented with Application Insights. During the test, the /api/checkout operation occasionally exceeds its 5-second SLA. You need to determine whether the excessive latency originates inside the app or inside a downstream dependency. Which Kusto Query Language (KQL) statement should you run in Log Analytics to generate a time-series chart that shows the average request duration together with the average duration of related dependency calls for the same operation?

  • traces | where message contains '/api/checkout' | summarize avg(duration) by bin(timestamp, 1m)

  • requests | where name == '/api/checkout' | summarize avg(duration) by bin(timestamp, 1m)

  • requests | where name == '/api/checkout' | project operation_Id, requestDuration = duration, timestamp | join kind=inner ( dependencies | project operation_Id, dependencyDuration = duration ) on operation_Id | summarize avg(requestDuration), avg(dependencyDuration) by bin(timestamp, 1m)

  • dependencies | where target contains '/api/checkout' | summarize avg(duration) by bin(timestamp, 1m)

Microsoft DevOps Engineer Expert AZ-400
Implement an instrumentation strategy
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