The correct actions are to examine the canary logs in CloudWatch Logs, check VPC Flow Logs for network issues, and increase the canary timeout setting. These three steps directly address the root causes of timeout errors in CloudWatch Synthetics: application-level failures logged in the canary’s execution logs, network connectivity problems visible in VPC Flow Logs, and an insufficient timeout threshold that prematurely terminates the canary. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding that Synthetics canaries run as AWS Lambda functions, not on EC2, so EC2-related troubleshooting is a common trap. CloudTrail is also a distractor because it records API calls, not canary execution details. A useful memory tip is “Logs, Flows, Timeout” — always check the canary’s own logs first, then network flow logs for connectivity, and finally adjust the timeout if the application response is legitimately slow.
DOP-C02 Monitoring and Logging Practice Question
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 company is using Amazon CloudWatch Synthetics canaries to monitor its web application endpoints. The canaries are failing intermittently with timeout errors. The DevOps team needs to troubleshoot the root cause. Which THREE actions should they take? (Select THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase the canary timeout configuration to allow more time for the endpoint to respond.
Options B, C, and D are correct. B: Checking VPC Flow Logs helps identify network issues. C: Checking canary logs provides details about the failure. D: Increasing canary timeout may resolve if the timeout is too low. A is wrong because canaries run in Lambda and do not use EC2. E is wrong because CloudTrail does not capture canary execution details.
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.
✗
Use AWS CloudTrail to review Canary API calls.
Why it's wrong here
CloudTrail logs API calls to create canaries, not execution details.
✓
Increase the canary timeout configuration to allow more time for the endpoint to respond.
Why this is correct
If the timeout is too low, increasing it may resolve false positives.
Related concept
Read the scenario before looking for a memorised answer.
✗
Check the EC2 instance CPU utilization in the VPC where the canaries run.
Why it's wrong here
Canaries run as Lambda functions, not on EC2 instances.
✓
Review VPC Flow Logs to see if requests are being dropped or denied.
Why this is correct
Flow logs can reveal network issues causing timeouts.
Related concept
Read the scenario before looking for a memorised answer.
✓
Examine the canary logs in CloudWatch Logs for error messages.
Why this is correct
Canary logs contain output from the script execution.
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 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 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.
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: Increase the canary timeout configuration to allow more time for the endpoint to respond. — Options B, C, and D are correct. B: Checking VPC Flow Logs helps identify network issues. C: Checking canary logs provides details about the failure. D: Increasing canary timeout may resolve if the timeout is too low. A is wrong because canaries run in Lambda and do not use EC2. E is wrong because CloudTrail does not capture canary execution details.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company is using Amazon CloudWatch Synthetics to monitor the availability of a web application. The canary runs every 5 minutes from multiple locations. Recently, the canary has been failing intermittently with HTTP 503 errors, but the application team reports that the application is healthy. Which step should the DevOps engineer take to identify the cause of the false positives?
medium
A.Increase the canary timeout setting to allow more time for the application to respond.
B.Add more canary locations to increase coverage.
✓ C.Review the canary's CloudWatch Logs to check for network errors or timeouts.
D.Increase the canary run frequency to every 1 minute.
Why C: Option C is correct because checking the canary's CloudWatch Logs might reveal that the failure is due to a network timeout or other client-side issue, not the application. Option A is wrong because increasing canary frequency would generate more data but not identify the cause. Option B is wrong because increasing timeout might mask the issue. Option D is wrong because adding more locations would not pinpoint the cause if the issue is client-side.
Last reviewed: Jun 20, 2026
Question Discussion
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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.
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