Task Statement 5.3: Troubleshoot System and Application Failures. DOP-C02 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   A CloudFormation stack update fails. Where can a DevOps engineer find the specific error message that explains why the update failed?

   • AIn the AWS CloudTrail logs only
   • BIn the CloudFormation stack events
   • CIn the EC2 instance system log
   • DIn the CodePipeline execution history
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   When performing root cause analysis for a system failure, which sequence of steps is most aligned with a systematic approach?

   • ACollect data from logs, metrics, and traces; form a hypothesis; test the hypothesis; identify the root cause.
   • BRestart all affected services and then review logs to see if the issue recurs.
   • CImmediately implement a fix based on initial symptoms, then document the outcome.
   • DReview the most recent code changes and revert them without further investigation.
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   An instance in an Auto Scaling group is repeatedly being terminated and replaced. Which of the following is the most likely cause?

   • AThe instance is not part of a target group.
   • BThe instance has too much CPU usage.
   • CThe instance is using an outdated AMI.
   • DThe instance is failing the health checks configured for the Auto Scaling group.
   Reveal Solution Discussion Select an answer first
5. 19expert · hard

   A company runs a microservices application on Amazon ECS. The application has a service that is failing intermittently. The DevOps team has enabled AWS X-Ray tracing and CloudWatch Logs. The team notices that the service's error rate increases when a downstream service experiences high latency. The team wants to identify the root cause of the intermittent failures. Which approach is the MOST effective?

   • ACheck the ECS service events to see if the service is being restarted.
   • BReview the CloudWatch alarms to see if any are triggered during the failures.
   • CAnalyze the X-Ray traces to identify the specific requests that fail and the downstream service that is causing the latency.
   • DIncrease the CloudWatch Logs retention period to ensure that logs are available for analysis.
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   An Auto Scaling group is not launching new instances as expected. Which of the following should be examined first to understand why the scaling action did not occur?

   • AThe VPC flow logs
   • BThe scaling policy and the CloudWatch alarms that trigger it
   • CThe instance's application logs
   • DThe IAM role attached to the instances
   Reveal Solution Discussion Select an answer first