Task Statement 5.3: Troubleshoot System and Application Failures. DOP-C02 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A DevOps engineer is troubleshooting a failed AWS CloudFormation stack update. The stack update failed because a resource could not be created. The engineer wants to determine the exact reason for the failure. Which approach is the MOST efficient?

   • ACheck the application logs on the EC2 instances that were created by the stack.
   • BUse the AWS CLI to describe the stack resources.
   • CReview the AWS CloudTrail logs for the CloudFormation API calls.
   • DCheck the CloudFormation stack events in the AWS Management Console.
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2. 2foundation · easy

   Which AWS service can be used to create canary tests that run against an application endpoint to validate that a deployment did not break functionality?

   • AAmazon CloudWatch Logs
   • BAWS X-Ray
   • CAmazon CloudWatch Synthetics
   • DAWS CloudTrail
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4. 3foundation · easy

   A CodeBuild build fails during the build phase. Which log source should a DevOps engineer examine first to troubleshoot the failure?

   • AThe CloudTrail event history
   • BThe CloudFormation stack events
   • CThe build logs generated by CodeBuild
   • DThe CodeDeploy deployment logs
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5. 4foundation · easy

   What is the primary benefit of using CloudWatch synthetic monitoring after a deployment?

   • AIt proactively validates that the application behaves as expected from a user perspective.
   • BIt automatically rolls back the deployment if any error occurs.
   • CIt replaces the need for any other monitoring or logging.
   • DIt provides detailed traces of every user request.
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6. 5expert · hard

   A DevOps engineer is troubleshooting an Amazon EKS cluster where a new deployment is failing. The pods are in a CrashLoopBackOff state. The engineer has checked the pod logs and found that the application is failing to connect to a database. The database is running in the same cluster as a separate deployment. The engineer has verified that the database service exists and the endpoints are populated. What should the engineer check NEXT?

   • ACheck the database deployment's resource limits to ensure it has enough resources to accept connections.
   • BCheck the database service's type to ensure it is accessible from the application's namespace.
   • CCheck the network policies in the cluster to ensure the application can reach the database service.
   • DCheck the application's environment variables to ensure the database connection string is correct.
   Reveal Solution Discussion Select an answer first