SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company is using Amazon S3 to store sensitive documents. The security team requires that all objects be encrypted at rest using a customer-managed key (CMK) stored in AWS KMS. Additionally, the CMK must be rotated automatically every year. How should the company configure this?
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
✓
Use S3 default encryption with SSE-KMS and enable automatic key rotation on the CMK.
Enable S3 default encryption with SSE-KMS and configure automatic key rotation on the CMK. This meets both requirements.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use S3 default encryption with SSE-KMS and create a new CMK every year.
Why it's wrong here
Creating a new CMK each year does not automatically rotate the existing key.
- ✗
Use S3 bucket policies to enforce encryption and use KMS manual key rotation.
Why it's wrong here
Manual rotation is not automatic.
- ✓
Use S3 default encryption with SSE-KMS and enable automatic key rotation on the CMK.
Why this is correct
This ensures all objects are encrypted with the CMK and the key is rotated annually.
- ✗
Use S3 default encryption with SSE-S3 and enable KMS automatic key rotation.
Why it's wrong here
SSE-S3 does not use a CMK.
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 SAP-C02 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 SAP-C02 exam.