DEA-C01 Data Operations and Support Practice Question
Network Topology
A data engineer runs the above AWS CLI command to investigate who uploaded a file to an S3 bucket. The output shows the event was recorded. Which additional step is needed to confirm the identity of the user?
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
✓
No additional step is needed; the 'Username' field already identifies the IAM user.
The 'Username' field in the CloudTrail event log directly identifies the IAM user who made the API call. No additional step is needed to confirm the identity. Options B, C, and D are unnecessary as they provide supplementary information but do not directly identify the user when the Username is already present.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
No additional step is needed; the 'Username' field already identifies the IAM user.
Why this is correct
The 'Username' field contains the full ARN of the IAM user who made the request.
- ✗
Use the 'MFA' field to check if multi-factor authentication was used.
Why it's wrong here
MFA status is not in the basic event fields; it may be in the full event, but the user identity is already known.
- ✗
View the 'accessKeyId' field in the CloudTrailEvent JSON.
Why it's wrong here
The access key is not shown in the summary; it is in the full event JSON, but the user identity is already clear from the ARN.
- ✗
Look up the 'sourceIPAddress' in the CloudTrailEvent.
Why it's wrong here
The IP address is not needed to confirm the user identity; the ARN is sufficient.
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 |
Go deeper
Related to this question
About these practice questions
One of 1,711 original DEA-C01 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DEA-C01 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 DEA-C01 exam.