The correct diagnostic steps are enabling Container Insights for the ECS cluster and reviewing the ECS service logs from the awslogs driver. Container Insights provides granular metrics like CPU, memory, and network utilization for Fargate tasks, which helps identify resource exhaustion that often causes intermittent HTTP 5xx timeouts from the ALB. Meanwhile, the awslogs driver captures application-level output from each container, revealing errors such as unhandled exceptions or database connection failures that manifest as 5xx responses. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding that Fargate lacks EC2 instance-level access, so you must rely on CloudWatch logs and metrics rather than Systems Manager or instance metrics. A common trap is choosing X-Ray, but while it traces HTTP requests, it may not pinpoint application-level root causes. Remember the memory tip: “Fargate is serverless, so logs and metrics are your only access—no instances, no SSM.”
DOP-C02 Incident and Event Response Practice Question
This DOP-C02 practice question tests your understanding of incident and event response. 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 company uses Amazon ECS with the Fargate launch type for a microservices application. The application experiences intermittent HTTP 5xx errors from the ALB. The DevOps team needs to diagnose the issue. Which TWO steps should be taken to gather diagnostic information? (Choose TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable Container Insights for the ECS cluster.
Options B and D are correct. Option B: ECS service logs (from the awslogs driver) contain application output that can reveal errors. Option D: CloudWatch Container Insights provides metrics and logs for Fargate tasks, including resource utilization that can cause timeouts. Option A is wrong because instance-level metrics are not available with Fargate (no EC2 instances). Option C is wrong because X-Ray traces HTTP requests but may not capture the root cause if the error is at the application level. Option E is wrong because Fargate does not support Systems Manager Session Manager for tasks.
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.
✓
Enable Container Insights for the ECS cluster.
Why this is correct
Container Insights provides metrics and logs for Fargate tasks.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable AWS X-Ray tracing on the ECS service.
Why it's wrong here
X-Ray traces requests but does not provide detailed error logs.
✗
Enable detailed monitoring on the underlying EC2 instances.
Why it's wrong here
Fargate does not use EC2 instances; there are no instances to monitor.
✗
Use AWS Systems Manager Session Manager to connect to the running containers.
Why it's wrong here
Session Manager does not support connecting to Fargate containers.
✓
Configure the ECS task definition to send application logs to CloudWatch Logs.
Why this is correct
Application logs help identify errors in the code.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Incident and Event Response — This question tests Incident and Event Response — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable Container Insights for the ECS cluster. — Options B and D are correct. Option B: ECS service logs (from the awslogs driver) contain application output that can reveal errors. Option D: CloudWatch Container Insights provides metrics and logs for Fargate tasks, including resource utilization that can cause timeouts. Option A is wrong because instance-level metrics are not available with Fargate (no EC2 instances). Option C is wrong because X-Ray traces HTTP requests but may not capture the root cause if the error is at the application level. Option E is wrong because Fargate does not support Systems Manager Session Manager for tasks.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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