DEA-C01 Data Security and Governance Practice Question
A company uses S3 to store sensitive data. Which TWO S3 features can be used to protect data at rest?
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
✓
Server-Side Encryption with S3 Managed Keys (SSE-S3)
Server-Side Encryption with S3 Managed Keys (SSE-S3) and Server-Side Encryption with AWS KMS (SSE-KMS) both encrypt data at rest. Option A (S3 Versioning) protects against accidental deletion or overwrite, not encryption. Option D (S3 Transfer Acceleration) speeds up data transfers, not encryption. Option E (S3 Object Lock) prevents deletion or overwrite for compliance, not encryption.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
S3 Versioning
Why it's wrong here
Versioning protects against accidental deletion.
- ✓
Server-Side Encryption with S3 Managed Keys (SSE-S3)
Why this is correct
SSE-S3 encrypts data at rest.
- ✓
Server-Side Encryption with AWS KMS (SSE-KMS)
Why this is correct
SSE-KMS encrypts data at rest.
- ✗
S3 Transfer Acceleration
Why it's wrong here
Transfer Acceleration speeds up uploads, does not encrypt.
- ✗
S3 Object Lock
Why it's wrong here
Object Lock prevents deletion in a retention period.
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.