The answer is to inspect the Lambda function logs associated with the canary and review the canary logs stored in CloudWatch Logs. This is correct because CloudWatch Synthetics canaries run as AWS Lambda functions, and when they fail with a ClientError—typically indicating HTTP 4xx responses from the target endpoint—the detailed error context is captured in the Lambda execution logs and the canary-specific log groups. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding of where to find granular failure data versus high-level metrics; a common trap is choosing CloudWatch Metrics, which only show aggregate statistics like success/failure counts without error details, or CloudTrail, which records API calls but not canary execution output. Remember the memory tip: "Canaries chirp in Logs, not Metrics"—always dive into CloudWatch Logs and Lambda logs for the actual error message, not the dashboard numbers.
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 CloudWatch Synthetics canaries to monitor its web application endpoints. The canaries are failing intermittently with 'ClientError' status codes. Which TWO actions should the engineer take to diagnose the issue? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Review the canary's CloudWatch Logs for error details.
Option A is correct because canary logs are stored in CloudWatch Logs and can be analyzed. Option D is correct because canaries run on Lambda, and Lambda execution logs may contain additional error details. Option B is wrong because CloudTrail does not log canary execution details. Option C is wrong because CloudWatch Metrics do not provide detailed error information. Option E is wrong because the canary code is not accessible for modification.
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.
✗
Modify the canary script to add more logging.
Why it's wrong here
Cannot modify pre-built canary scripts.
✓
Review the canary's CloudWatch Logs for error details.
Why this is correct
Canary logs contain detailed output of each step.
Related concept
Read the scenario before looking for a memorised answer.
✓
Inspect the Lambda function logs associated with the canary.
Why this is correct
Canaries run as Lambda functions; logs contain execution details.
Related concept
Read the scenario before looking for a memorised answer.
✗
Examine CloudWatch metrics for the canary.
Why it's wrong here
Metrics provide counts but not detailed errors.
✗
Check CloudTrail for CanaryRun API calls.
Why it's wrong here
CloudTrail logs API calls, not execution details.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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: Review the canary's CloudWatch Logs for error details. — Option A is correct because canary logs are stored in CloudWatch Logs and can be analyzed. Option D is correct because canaries run on Lambda, and Lambda execution logs may contain additional error details. Option B is wrong because CloudTrail does not log canary execution details. Option C is wrong because CloudWatch Metrics do not provide detailed error information. Option E is wrong because the canary code is not accessible for modification.
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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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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