DEA-C01 Data Security and Governance Practice Question
A company uses AWS CloudTrail to log all API calls. The security team wants to ensure that log files are tamper-proof and cannot be deleted. Which TWO actions should the data engineer take? (Choose TWO.)
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
✓
Enable CloudTrail log file validation
To ensure CloudTrail log files are tamper-proof and cannot be deleted, enable CloudTrail log file validation (option A) to verify integrity and detect tampering, and enable S3 Object Lock on the S3 bucket (option B) to prevent deletion or overwrites. Option C (MFA Delete) requires additional setup and is not automatically enforced by CloudTrail; it is not the primary mechanism for preventing deletion. Option D (S3 Versioning) alone does not prevent deletion; it preserves older versions but allows deletion of current versions. Option E (SSE-KMS) encrypts data but does not prevent deletion.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable CloudTrail log file validation
Why this is correct
Provides integrity verification to detect tampering.
- ✓
Enable S3 Object Lock on the S3 bucket
Why this is correct
Prevents object deletion.
- ✗
Enable MFA Delete on the S3 bucket
Why it's wrong here
MFA Delete requires root and is not automatically configured.
- ✗
Enable S3 Versioning on the S3 bucket
Why it's wrong here
Versioning retains deleted objects but does not prevent deletion.
- ✗
Enable SSE-KMS encryption on the S3 bucket
Why it's wrong here
Encryption does not prevent deletion.
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
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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.