A developer is troubleshooting a performance issue in a serverless application. The trace shows that a Lambda function is slow, but the developer needs to know which downstream call is causing the delay. They have already enabled X-Ray tracing. What should they do?

Add annotations to each subsegment in the Lambda function to record the latency of each downstream call.

View the trace map in the X-Ray console to see the overall latency.

Use AWS Distro for OpenTelemetry to automatically instrument all calls.

Enable CloudWatch Logs and add timing logs for each call.

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Domain 4Objective 2

Task 2: Instrument Code for Observability DVA-C02 Practice Questions (Page 6)

Part of the Content Domain 4: Troubleshooting and Optimization domain, which accounts for 18% of the DVA-C02 exam. AWS does not publish an official question count, but from its 130-minute exam (~50–85 total, ~9–15 in this domain), expect 3–5 from this objective — we provide 28 practice questions to prepare you well beyond it. (estimate)

28questions here

6free pages

8concepts

18%of the exam

Questions 26–28

26expert · hard
A developer is troubleshooting a performance issue in a serverless application. The trace shows that a Lambda function is slow, but the developer needs to know which downstream call is causing the delay. They have already enabled X-Ray tracing. What should they do?
Select an answer first
27foundation · easy
In a Kubernetes deployment, a developer wants to configure a check that restarts a container if it becomes unresponsive. Which type of probe should be configured?
Select an answer first
28foundation · easy
A developer wants to trace requests across an application that uses multiple AWS services. Which AWS service is specifically designed for distributed tracing?
Select an answer first

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Task 2: Instrument Code for Observability DVA-C02 Practice Questions (Page 6)

Questions 26–28

A developer is troubleshooting a performance issue in a serverless application. The trace shows that a Lambda function is slow, but the developer needs to know which downstream call is causing the delay. They have already enabled X-Ray tracing. What should they do?

In a Kubernetes deployment, a developer wants to configure a check that restarts a container if it becomes unresponsive. Which type of probe should be configured?

A developer wants to trace requests across an application that uses multiple AWS services. Which AWS service is specifically designed for distributed tracing?

Keep studying — Content Domain 4: Troubleshooting and Optimization