4.4 Capturing and Analyzing Distributed Traces PROFESSIONAL-CLOUD-DEVOPS-ENGINEER Practice Questions (Page 5)

Questions 21–24

1. 21foundation · medium

   Which type of output does Gemini Cloud Assist provide when analyzing a distributed trace?

   • AA list of all span attributes
   • BA configuration file for the tracing SDK
   • CA summary of the trace with potential issues
   • DA new trace with corrected spans
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2. 22expert · hard

   You have a Java service that uses a custom thread pool to process tasks asynchronously. You notice that traces are not correctly correlating work done in the asynchronous tasks with the original request. The parent span ends before the asynchronous work completes. What is the most likely cause and what should you do?

   • AThe thread pool is not instrumented; enable automatic instrumentation for the thread pool.
   • BThe asynchronous tasks are creating a new trace; configure the SDK to use the same trace ID for all threads.
   • CThe trace context is not being propagated to the asynchronous threads; use the OpenTelemetry context propagation mechanism to pass the context to the thread pool.
   • DThe parent span is ending too early; increase the span timeout to wait for the asynchronous work.
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4. 23application · medium

   Your application writes structured logs in JSON format and uses OpenTelemetry for tracing. You need to correlate a specific trace ID with the logs generated by each service involved in that trace. What should you configure to enable this correlation?

   • AUse the same service name for all services so logs and traces share a common label.
   • BExport logs to Cloud Logging and traces to Cloud Trace, then manually match timestamps to correlate them.
   • CEnable automatic instrumentation on all services to ensure logs are automatically linked to traces.
   • DAdd the trace ID and span ID as fields in the log entries using the OpenTelemetry SDK's log correlation feature.
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5. 24application · medium

   You have a Go service that processes orders. You want to add a custom span that measures the time spent validating business rules, which is not automatically captured. You also want to record a custom attribute indicating the number of validation errors. What should you do?

   • AUse the OpenTelemetry API to create a new span around the validation logic and add the attribute to that span.
   • BModify the validation function to return the duration and error count, then include them in the parent span's attributes.
   • CAdd a log entry with the validation time and error count, and rely on log correlation.
   • DEnable automatic instrumentation for the Go service to capture all function calls.
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