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1. You've finished setting up distributed tracing using automatic instrumentation. You shared the output to your internal stakeholders and their feedback is that the time spent on each component is not granular enough. The stakeholders would like to see more detail.

What should you do?

2. How long are traces retained?

3. You own the Payments API which is a critical service. Your manager would like you to show the day-to-day count of requests to the Post Payment endpoint that are successful but responded with medium latency. Medium latency is 1 to 3 seconds, and the manager would like to compare 3 months worth of data going forward.

How can you accomplish this with Datadog APM features?

4. Setting DD_TRACE_SAMPLE_RATE affects which distributed tracing functionality?

5. Which of the following trace metrics represent the count of errors for rack.request spans?

6. Which view is best for checking sets of errors over time to know when they first started, if they are still ongoing, and how often they are occurring?

7. How do you configure the primary operation of a service?

8. What is the purpose of Resources in Datadog APM?

9. You made a trace metric query and noticed that when grouping by the version tag, there's a group showing up as N/A. Other groups show the version of your app as expected.

What could be a possible cause for this?

10. How do you monitor shadow deployments with APM?

11. What is the default retention for profiles?

12. When doing deployment comparison with Deployment Tracking, how far back can you compare two versions?

13. What is a span in APM?

14. What is the Datadog Lambda Extension?

15. You would like to collect node labels so that you can set them as the second primary tags. Where should you set DD_KUBERNETES_NODE_LABELS_AS_TAGS?

16. Which reserved tags do you use for Unified Service Tagging?

17. Which port and protocol does the Datadog Agent use to receive APM data?

18. How can you modify the default tracer object to use another hostname and port?

19. What information do tracer debug logs contain?

20. What environment variable should you use if you need to send traces to a different socket, host, or port?

21. Where can you set the sampling rates for head-based sampling?

22. Which service type supports configuring the Apdex?

23. How can you update an existing span-based metric?

24. Which of the following is the correct query if you would like to create an SLO of 99.9% of requests do not encounter an error?

25. What is Datadog's recommendation on enabling tracer debug mode?