DEA-C01 Data Security and Governance Practice Question
A company is designing a data lake on AWS using S3. The security team requires that all data be encrypted at rest and that encryption keys be rotated annually. Which services can be used to meet these requirements? (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
✓
AWS Key Management Service (AWS KMS)
AWS KMS (C) allows creating customer-managed keys that can be rotated annually or automatically. Amazon S3 managed keys (SSE-S3) (E) provide encryption at rest with keys that are automatically rotated by AWS. Option A (AWS Secrets Manager) is for storing secrets, not encryption keys. Option B (ACM) is for SSL/TLS certificates. Option D (CloudHSM) provides hardware security modules but does not support automatic key rotation for S3 and is not typically used for S3 encryption key management.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS Secrets Manager
Why it's wrong here
For managing secrets, not encryption keys for S3.
- ✗
AWS Certificate Manager (ACM)
Why it's wrong here
For SSL/TLS certificates.
- ✓
AWS Key Management Service (AWS KMS)
Why this is correct
Allows customer-managed keys with automatic yearly rotation.
- ✗
AWS CloudHSM
Why it's wrong here
Not directly integrated with S3 for automatic rotation.
- ✓
Amazon S3 managed keys (SSE-S3)
Why this is correct
Provides encryption at rest with automatic key rotation.
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.