- A
Use CloudWatch Logs to monitor the logs, and create a metric filter to trigger an alarm when the DeleteBucket event appears.
Why wrong: A metric filter with an alarm can alert but does not directly trigger an automated response; it only sends a notification via SNS.
- B
Configure S3 event notifications to send to an SQS queue, and poll the queue with a Lambda function.
Why wrong: S3 event notifications can be configured for object-level events, but bucket deletion events are not supported as S3 event notifications.
- C
Configure CloudTrail to deliver logs to an S3 bucket, and use S3 event notifications to invoke a Lambda function.
Why wrong: CloudTrail logs are delivered in intervals, not real-time, and S3 event notifications for new log objects would not provide immediate detection.
- D
Send CloudTrail logs to CloudWatch Logs, create a CloudWatch Events rule matching the DeleteBucket event, and target a Lambda function.
This setup enables real-time detection of the DeleteBucket API call through CloudTrail, triggering an automated response via Lambda.
DOP-C02 Monitoring and Logging Practice Question
This DOP-C02 practice question tests your understanding of monitoring and logging. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 AWS CloudTrail to monitor API activity. The DevOps team needs to ensure that any deletion of an S3 bucket is detected in real time and triggers an automated response. Which combination of AWS services should be used to meet 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
Send CloudTrail logs to CloudWatch Logs, create a CloudWatch Events rule matching the DeleteBucket event, and target a Lambda function.
Option D is correct because CloudTrail logs can be sent to CloudWatch Logs, and a CloudWatch Events rule (now Amazon EventBridge) can be created to match the DeleteBucket event and trigger a Lambda function for automated response in real time. Option A is incorrect because CloudWatch Logs monitors log data, but a metric filter on DeleteBucket events in CloudTrail logs can trigger an alarm, but that is not as direct as EventBridge. More importantly, CloudWatch Logs metric filters have latency and are not the best for real-time response. Option B is incorrect because S3 event notifications are for operations on objects, not for bucket-level operations like deletion. Option C is incorrect because while CloudTrail can deliver logs to S3, S3 event notifications are not triggered by CloudTrail log file delivery; they are for object-level events. Using EventBridge directly with CloudTrail is the correct real-time approach.
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 CloudWatch Logs to monitor the logs, and create a metric filter to trigger an alarm when the DeleteBucket event appears.
Why it's wrong here
A metric filter with an alarm can alert but does not directly trigger an automated response; it only sends a notification via SNS.
- ✗
Configure S3 event notifications to send to an SQS queue, and poll the queue with a Lambda function.
Why it's wrong here
S3 event notifications can be configured for object-level events, but bucket deletion events are not supported as S3 event notifications.
- ✗
Configure CloudTrail to deliver logs to an S3 bucket, and use S3 event notifications to invoke a Lambda function.
Why it's wrong here
CloudTrail logs are delivered in intervals, not real-time, and S3 event notifications for new log objects would not provide immediate detection.
- ✓
Send CloudTrail logs to CloudWatch Logs, create a CloudWatch Events rule matching the DeleteBucket event, and target a Lambda function.
Why this is correct
This setup enables real-time detection of the DeleteBucket API call through CloudTrail, triggering an automated response via Lambda.
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 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: Send CloudTrail logs to CloudWatch Logs, create a CloudWatch Events rule matching the DeleteBucket event, and target a Lambda function. — Option D is correct because CloudTrail logs can be sent to CloudWatch Logs, and a CloudWatch Events rule (now Amazon EventBridge) can be created to match the DeleteBucket event and trigger a Lambda function for automated response in real time. Option A is incorrect because CloudWatch Logs monitors log data, but a metric filter on DeleteBucket events in CloudTrail logs can trigger an alarm, but that is not as direct as EventBridge. More importantly, CloudWatch Logs metric filters have latency and are not the best for real-time response. Option B is incorrect because S3 event notifications are for operations on objects, not for bucket-level operations like deletion. Option C is incorrect because while CloudTrail can deliver logs to S3, S3 event notifications are not triggered by CloudTrail log file delivery; they are for object-level events. Using EventBridge directly with CloudTrail is the correct real-time approach.
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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