4.5 Troubleshooting Issues PROFESSIONAL-CLOUD-DEVOPS-ENGINEER Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   An application fails to start because it cannot connect to a required database. Which type of issue is this?

   • AResource exhaustion
   • BDependency failure
   • CNetwork failure
   • DMisconfiguration
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2. 17foundation · easy

   An application is returning 500 errors. After analyzing the logs, the engineer finds that the application is throwing a NullPointerException. Which action is most appropriate to resolve the issue?

   • ARestart the VM.
   • BIncrease the VM's memory.
   • CChange the application's logging level.
   • DFix the code to handle null values before they are used.
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   An application running on Compute Engine crashes unexpectedly. Which artifact is most useful for diagnosing the cause of the crash?

   • AThe VM's disk I/O metrics
   • BThe VM's CPU utilization metrics
   • CThe VM's network traffic logs
   • DThe application's stack trace from the logs
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5. 19foundation · easy

   A user reports that queries in Cloud Logging are returning incomplete results. Which issue is most likely?

   • AThe user does not have permission to view all logs.
   • BThe log entries are too large.
   • CThe user's query syntax is incorrect.
   • DThe log retention period has expired for older logs.
   Reveal Solution Discussion Select an answer first
6. 20expert · hard

   You are diagnosing a latency issue in a service. You have traces enabled, but you notice that only about 10% of requests have traces. The other 90% of requests show no trace data. The service is a high-traffic API. You need to get complete trace data for all requests to properly diagnose the issue. What is the most likely cause and the best solution?

   • AThe application is only instrumenting a subset of its endpoints; add instrumentation to the remaining endpoints.
   • BThe Cloud Trace API is rate-limiting the ingestion of spans; contact support to increase the quota.
   • CThe trace context is being lost in asynchronous calls within the application; fix the context propagation.
   • DThe trace sampling rate is set to 0.1 (10%) in the Cloud Trace configuration; increase the sampling rate to 1.0 to capture all traces.
   Reveal Solution Discussion Select an answer first