- A
Create custom CloudWatch metrics from Lambda functions for each step, and build a CloudWatch dashboard.
Why wrong: Incorrect. While custom CloudWatch metrics could track step durations and errors, implementing them requires extensive instrumentation in each Lambda function and does not natively provide workflow-level context such as the current step or execution progress. This approach is more complex and less real-time than using EventBridge events.
- B
Use Amazon EventBridge to capture Step Functions execution status changes and build a custom dashboard in CloudWatch.
Correct. Amazon EventBridge captures Step Functions execution state changes (e.g., 'ExecutionStarted', 'TaskStateEntered', 'ExecutionFailed') in near real-time. These events can be used to build a CloudWatch dashboard that shows the current step, duration per step, and errors, meeting all requirements without custom instrumentation.
- C
Configure each Lambda function to write logs to CloudWatch Logs with the execution ID, and use CloudWatch Logs Insights to query and visualize.
Why wrong: Incorrect. While Lambda logs to CloudWatch Logs, querying with Logs Insights is not near real-time and requires manual querying. It does not provide a continuous dashboard for monitoring workflow progress. Also, correlating logs across steps requires complex parsing of execution IDs.
- D
Enable AWS X-Ray tracing on the Step Functions and Lambda functions to get a service map and trace details.
Why wrong: Incorrect. AWS X-Ray provides detailed tracing of service calls and latencies, but it is designed for distributed tracing of individual requests, not for aggregating workflow-level metrics like step durations and execution progress. It also adds additional overhead and cost, and does not inherently provide a dashboard for near real-time visibility.
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 media company runs a video transcoding pipeline on AWS. The pipeline uses AWS Step Functions to orchestrate multiple Lambda functions that transcode video files stored in Amazon S3. The company wants to implement a monitoring solution to track the progress of each workflow execution, including which step is currently running, the duration of each step, and any errors. The solution should provide near real-time visibility and allow the team to troubleshoot failed executions quickly. Which solution meets these requirements?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use Amazon EventBridge to capture Step Functions execution status changes and build a custom dashboard in CloudWatch.
Option B is correct because Amazon EventBridge (formerly CloudWatch Events) can capture Step Functions execution state changes (e.g., step started, succeeded, failed). These events can be used to build a custom dashboard in CloudWatch, providing near real-time visibility into workflow progress, step durations, and errors. Option A is incorrect because creating custom metrics from Lambda functions requires additional instrumentation and does not provide workflow-level context easily. Option C is incorrect because CloudWatch Logs Insights queries are not near real-time; they require searching through logs, and the solution needs real-time visibility. Option D is incorrect because AWS X-Ray provides distributed tracing for individual requests, but it does not offer high-level workflow step tracking with durations and errors aggregated across executions in near real-time.
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.
- ✗
Create custom CloudWatch metrics from Lambda functions for each step, and build a CloudWatch dashboard.
Why it's wrong here
Incorrect. While custom CloudWatch metrics could track step durations and errors, implementing them requires extensive instrumentation in each Lambda function and does not natively provide workflow-level context such as the current step or execution progress. This approach is more complex and less real-time than using EventBridge events.
- ✓
Use Amazon EventBridge to capture Step Functions execution status changes and build a custom dashboard in CloudWatch.
Why this is correct
Correct. Amazon EventBridge captures Step Functions execution state changes (e.g., 'ExecutionStarted', 'TaskStateEntered', 'ExecutionFailed') in near real-time. These events can be used to build a CloudWatch dashboard that shows the current step, duration per step, and errors, meeting all requirements without custom instrumentation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure each Lambda function to write logs to CloudWatch Logs with the execution ID, and use CloudWatch Logs Insights to query and visualize.
Why it's wrong here
Incorrect. While Lambda logs to CloudWatch Logs, querying with Logs Insights is not near real-time and requires manual querying. It does not provide a continuous dashboard for monitoring workflow progress. Also, correlating logs across steps requires complex parsing of execution IDs.
- ✗
Enable AWS X-Ray tracing on the Step Functions and Lambda functions to get a service map and trace details.
Why it's wrong here
Incorrect. AWS X-Ray provides detailed tracing of service calls and latencies, but it is designed for distributed tracing of individual requests, not for aggregating workflow-level metrics like step durations and execution progress. It also adds additional overhead and cost, and does not inherently provide a dashboard for near real-time visibility.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
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: Use Amazon EventBridge to capture Step Functions execution status changes and build a custom dashboard in CloudWatch. — Option B is correct because Amazon EventBridge (formerly CloudWatch Events) can capture Step Functions execution state changes (e.g., step started, succeeded, failed). These events can be used to build a custom dashboard in CloudWatch, providing near real-time visibility into workflow progress, step durations, and errors. Option A is incorrect because creating custom metrics from Lambda functions requires additional instrumentation and does not provide workflow-level context easily. Option C is incorrect because CloudWatch Logs Insights queries are not near real-time; they require searching through logs, and the solution needs real-time visibility. Option D is incorrect because AWS X-Ray provides distributed tracing for individual requests, but it does not offer high-level workflow step tracking with durations and errors aggregated across executions in near real-time.
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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Last reviewed: Jun 20, 2026
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