DEA-C01 Data Security and Governance Practice Question
A company needs to protect sensitive data stored in Amazon S3 from unauthorized access. 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
✓
Configure S3 bucket policies to require MFA for delete operations
S3 Block Public Access at the account level prevents any public access to S3 buckets, ensuring data is not exposed. Requiring MFA for delete operations via bucket policies adds an extra layer of security by requiring a second factor. Cross-region replication is for disaster recovery, not security. Lifecycle policies manage storage costs. Versioning protects against accidental deletion but does not prevent unauthorized access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure S3 bucket policies to require MFA for delete operations
Why this is correct
Correct. Using S3 bucket policies with a condition that requires MFA for delete operations prevents unauthorized users from deleting objects, adding an additional security layer.
- ✗
Enable cross-region replication for all buckets
Why it's wrong here
Wrong. Cross-region replication is primarily for disaster recovery and data locality, not for preventing unauthorized access.
- ✗
Set up an S3 Lifecycle policy to transition objects to Glacier
Why it's wrong here
Wrong. S3 Lifecycle policies manage storage class transitions for cost optimization, not security or access control.
- ✓
Enable S3 Block Public Access at the account level
Why this is correct
Correct. Enabling S3 Block Public Access at the account level prevents any public access to S3 buckets, effectively blocking unauthorized external access.
- ✗
Enable S3 Versioning on all buckets
Why it's wrong here
Wrong. S3 Versioning helps protect against accidental deletion and allows restoration, but does not prevent unauthorized access itself.
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 |
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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.