This DOP-C02 practice question tests your understanding of monitoring and logging. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A DevOps team is troubleshooting a slow application. They enabled AWS X-Ray tracing and see that one of the downstream services has a high average response time. However, the traces show that the service itself is fast; the delay is in the network call from the upstream service. Which X-Ray feature should the team use to identify the root cause?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Examine the trace map to see the connection between services.
The trace map in AWS X-Ray provides a visual representation of the service graph, showing the connections and latency between services. Since the delay is in the network call from the upstream service to the downstream service, the trace map can highlight the specific edge where the high latency occurs, allowing the team to pinpoint whether the issue is due to network congestion, DNS resolution, or a slow HTTP connection. This is the most direct way to identify the root cause of the inter-service communication delay.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Examine the trace map to see the connection between services.
Why this is correct
Correct: The trace map visualizes service connections and latency.
Related concept
Read the scenario before looking for a memorised answer.
✗
Add annotations to the traces for better filtering.
Why it's wrong here
Incorrect: Annotations are for filtering, not diagnosing network latency.
✗
View the raw segments of the upstream service.
Why it's wrong here
Incorrect: Segments show service-internal timing, not network latency.
✗
Adjust the sampling rules to capture more traces.
Why it's wrong here
Incorrect: Sampling rules affect trace volume, not diagnosis.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates might focus on the downstream service's segment (Option C) thinking the delay is inside that service, when the trace map is specifically designed to reveal inter-service communication latency that is not captured by individual segment durations.
Trap categories for this question
Command / output trap
Incorrect: Segments show service-internal timing, not network latency.
Detailed technical explanation
How to think about this question
Under the hood, AWS X-Ray trace maps are built from segment and subsegment data, where each edge represents a downstream call (e.g., HTTP, AWS SDK, or SQL). The trace map uses a service graph that aggregates response times and error rates for each connection, making it ideal for spotting network-level delays that are not visible in the service's own segment duration. In a real-world scenario, a high average response time on the trace map edge could indicate a TCP handshake delay, TLS negotiation overhead, or a proxy timeout, which would not be evident from the downstream service's fast segment alone.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Monitoring and Logging — This question tests Monitoring and Logging — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Examine the trace map to see the connection between services. — The trace map in AWS X-Ray provides a visual representation of the service graph, showing the connections and latency between services. Since the delay is in the network call from the upstream service to the downstream service, the trace map can highlight the specific edge where the high latency occurs, allowing the team to pinpoint whether the issue is due to network congestion, DNS resolution, or a slow HTTP connection. This is the most direct way to identify the root cause of the inter-service communication delay.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This DOP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DOP-C02 exam.
Question Discussion
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