Quick Answer
The answer is CloudTrail Event history. This feature provides a searchable, filterable view of the last 90 days of management events across each AWS region, allowing you to quickly locate a specific DeleteBucket event by filtering on the bucket name and event name without needing to query S3 or set up additional infrastructure. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your ability to distinguish between CloudTrail’s native console features and its more complex delivery options like CloudTrail Lake or S3 exports—a common trap is assuming you must query S3 for recent events, when Event history is designed for exactly this rapid incident investigation. Remember the memory tip: “Event history for the last 90, no S3 query needed to find who was naughty.”
This DOP-C02 practice question tests your understanding of incident and event response. 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 log API events. During an incident investigation, they need to identify who deleted an S3 bucket. Which CloudTrail feature should be used to retrieve the event details quickly?
CloudTrail log file integrity validation
Why wrong: Ensures log files have not been tampered with, not for searching events.
CloudTrail Lake
Why wrong: Useful for querying but requires setup; not the quickest.
CloudTrail Event history
Provides 90 days of management events with user identity details.
CloudTrail Insights
Why wrong: Detects unusual activity but does not directly identify the user.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
CloudTrail Event history
CloudTrail Event history provides a view of the last 90 days of management events for each AWS region, allowing you to quickly search and filter by resource name (e.g., the S3 bucket name) and event name (e.g., DeleteBucket). This feature is designed for rapid retrieval of recent API activity without needing to query S3 or set up additional infrastructure, making it the fastest option for identifying who deleted an S3 bucket during an incident investigation.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
CloudTrail log file integrity validation
Why it's wrong here
Ensures log files have not been tampered with, not for searching events.
CloudTrail Lake
Why it's wrong here
Useful for querying but requires setup; not the quickest.
CloudTrail Event history
Why this is correct
Provides 90 days of management events with user identity details.
Related concept
Read the scenario before looking for a memorised answer.
CloudTrail Insights
Why it's wrong here
Detects unusual activity but does not directly identify the user.
Common exam traps
The trap here is that candidates often confuse CloudTrail Insights (which detects unusual activity) with the ability to search for specific past events, or they overcomplicate the solution by choosing CloudTrail Lake when Event history provides the quickest and simplest retrieval for recent events.
Detailed technical explanation
CloudTrail Event history stores management events for 90 days in an indexed, searchable format within the CloudTrail console and API, supporting filters like event name, resource name, user name, and time range. Under the hood, it queries the CloudTrail management event store, which is automatically enabled and free for the first copy of management events, allowing you to retrieve the user identity (ARN), source IP address, and event time for a DeleteBucket event without needing to parse raw log files from S3. In a real-world scenario, if the bucket was deleted more than 90 days ago, you would need to query CloudTrail logs stored in S3 or use CloudTrail Lake with a longer retention period.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Incident and Event Response — study guide chapter
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FAQ
Incident and Event Response — This question tests Incident and Event Response — Read the scenario before looking for a memorised answer..
The correct answer is: CloudTrail Event history — CloudTrail Event history provides a view of the last 90 days of management events for each AWS region, allowing you to quickly search and filter by resource name (e.g., the S3 bucket name) and event name (e.g., DeleteBucket). This feature is designed for rapid retrieval of recent API activity without needing to query S3 or set up additional infrastructure, making it the fastest option for identifying who deleted an S3 bucket during an incident investigation.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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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