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Microsoft DevOps Engineer Expert AZ-400 Practice Question

You manage several Linux virtual machines that host a mission-critical app in Azure. Users report periodic latency spikes. VM insights is enabled and all VMs send data to the same Log Analytics workspace. You must write a KQL query that returns the five VMs with the highest average combined network bytes (sent plus received) during the last 30 minutes. Which query should you use?

  • InsightsMetrics
| where Namespace == "Processor"
| where Name == "% Processor Time"
| where TimeGenerated > ago(30m)
| summarize AvgCpu = avg(Val) by Computer
| top 5 by AvgCpu desc

  • Perf
| where CounterName == "Network Adapter\\Bytes Total/sec"
| where TimeGenerated > ago(30m)
| summarize AvgBps = avg(CounterValue) by Computer
| top 5 by AvgBps desc

  • InsightsMetrics
| where Namespace == "Network"
| where Name in ("TotalBytesTransmitted", "TotalBytesReceived")
| where TimeGenerated > ago(30m)
| summarize AvgBps = avg(Val) by Computer
| top 5 by AvgBps desc

  • AzureActivity
| where TimeGenerated > ago(30m)
| summarize Events = count() by Caller
| top 5 by Events desc
Microsoft DevOps Engineer Expert AZ-400
Implement an instrumentation strategy
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