4.5 Troubleshooting Issues PROFESSIONAL-CLOUD-DEVOPS-ENGINEER Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   A web application is experiencing increased latency. Cloud Trace shows that a downstream service is taking 3 seconds to respond. Which diagnosis is most likely?

   • AThe downstream service is a slow dependency.
   • BThe application's code is inefficient.
   • CThe application's queue is full.
   • DThe network between services is slow.
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A Node.js application running on Compute Engine is crashing on startup. The application logs show the following error: 'Error: Cannot find module 'express''. The application's package.json file lists express as a dependency. The VM was recently created from a custom image. What is the most likely cause?

   • AThe node_modules directory was not included in the custom image, and the application's startup script does not run 'npm install'.
   • BThe VM's firewall is blocking outbound traffic to the npm registry, preventing module installation.
   • CThe application's main file is not specified correctly in the package.json, so Node.js is trying to load the wrong file.
   • DThe application is trying to use a version of express that is incompatible with the installed Node.js version.
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A CI/CD pipeline deploys a new version of a service to Cloud Run. The deployment succeeds, but the new revision immediately starts returning HTTP 503 errors. The previous revision is still serving traffic. The pipeline uses a progressive delivery strategy with a 10% traffic split. You need to diagnose the issue without causing a full outage. What is the best first step?

   • ACheck the logs for the new revision in Cloud Logging to see if there are any startup errors or configuration issues.
   • BVerify that the container image for the new revision is present in Artifact Registry and is not corrupted.
   • CCheck the Cloud Run service's IAM policy to ensure the new revision has permission to access required resources.
   • DImmediately roll back the traffic split to 100% on the previous revision to stop the errors.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   A CI/CD pipeline fails because the build step cannot fetch dependencies from a private repository. Which configuration is most likely misconfigured?

   • AThe pipeline's trigger branch
   • BThe pipeline's build timeout
   • CThe pipeline's integration with the private repository
   • DThe pipeline's artifact storage location
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   An application's latency increases when the number of concurrent requests rises. Which factor is most likely contributing to the latency?

   • AQueueing effects
   • BInsufficient disk space
   • CSlow network bandwidth
   • DIncorrect DNS configuration
   Reveal Solution Discussion Select an answer first