Quick Answer
The answer is AWS CloudTrail, as it is the service that records all API activity across AWS, including the `DeleteBucket` call that removes an S3 bucket. When investigating who deleted an S3 bucket, CloudTrail captures the exact IAM user or role, source IP address, and timestamp of the deletion event, providing a complete audit trail for security incidents. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this concept tests your understanding of governance and logging services; a common trap is confusing CloudTrail with AWS Config, which tracks resource configuration changes but not real-time API calls like bucket deletion. To remember this, think of CloudTrail as the “who, what, when” detective for all AWS actions, while Config is the “what changed” inventory tool. For S3 bucket deletion specifically, always look for the `DeleteBucket` event in CloudTrail event history.
This SOA-C02 practice question tests your understanding of monitoring, logging, and remediation. 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 SysOps administrator is investigating a security incident and needs to determine who deleted an S3 bucket. Which AWS service should be used to find this information?
AWS CloudTrail
CloudTrail records all management events, including DeleteBucket.
AWS Trusted Advisor
Why wrong: Trusted Advisor provides recommendations, not audit logs.
S3 server access logs
Why wrong: Server access logs record requests made to S3, but bucket deletion is an API call, not a request to the bucket.
CloudWatch Logs for the S3 service
Why wrong: CloudWatch Logs does not capture API calls natively.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS CloudTrail
AWS CloudTrail is the correct service because it records API activity across AWS services, including S3 bucket deletion events. When a user or role deletes an S3 bucket, CloudTrail logs the `DeleteBucket` API call with details such as the IAM user or role, source IP address, and timestamp, enabling the administrator to identify the responsible entity.
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.
AWS CloudTrail
Why this is correct
CloudTrail records all management events, including DeleteBucket.
Related concept
Read the scenario before looking for a memorised answer.
AWS Trusted Advisor
Why it's wrong here
Trusted Advisor provides recommendations, not audit logs.
S3 server access logs
Why it's wrong here
Server access logs record requests made to S3, but bucket deletion is an API call, not a request to the bucket.
CloudWatch Logs for the S3 service
Why it's wrong here
CloudWatch Logs does not capture API calls natively.
Common exam traps
The trap here is that candidates often confuse S3 server access logs (which log object-level requests) with CloudTrail (which logs management-plane API calls), leading them to incorrectly choose S3 server access logs for bucket deletion events.
Detailed technical explanation
Under the hood, CloudTrail captures `DeleteBucket` as a management event in the `us-east-1` region (the global region for S3 control plane operations) regardless of the bucket's actual region, because S3 bucket management APIs are global. A subtle behavior is that if the bucket is deleted by the AWS account root user, CloudTrail still logs the event but the `userIdentity` field will show `arn:aws:iam::<account-id>:root`. In real-world scenarios, enabling CloudTrail trails for all regions and logging management events is critical for forensic investigations, as `DeleteBucket` events are not recorded by S3 server access logs or other services.
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
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FAQ
Monitoring, Logging, and Remediation — This question tests Monitoring, Logging, and Remediation — Read the scenario before looking for a memorised answer..
The correct answer is: AWS CloudTrail — AWS CloudTrail is the correct service because it records API activity across AWS services, including S3 bucket deletion events. When a user or role deletes an S3 bucket, CloudTrail logs the `DeleteBucket` API call with details such as the IAM user or role, source IP address, and timestamp, enabling the administrator to identify the responsible entity.
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 SOA-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 SOA-C02 exam.
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