DEA-C01 Data Store Management Practice Question
A financial services company stores sensitive transaction data in an Amazon S3 bucket. Compliance requires that all objects be encrypted using SSE-KMS and that the bucket be protected from accidental deletion. Which combination of actions meets these requirements? (Select TWO.)
⚠ Common exam trap
Candidates often confuse default encryption (which only applies when no encryption header is provided) with a bucket policy that enforces encryption on every upload, or they mistakenly think MFA Delete or Block Public Access can enforce encryption requirements.
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
✓
Add a bucket policy that denies PutObject if the object is not encrypted with SSE-KMS
A bucket policy with a condition denying PutObject unless the object's encryption status matches SSE-KMS (using the s3:x-amz-server-side-encryption-aws-kms-key-id condition key) enforces encryption at the upload level. This ensures that any object written to the bucket must be encrypted with a KMS key, meeting the compliance requirement.
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 MFA Delete on the bucket
Why it's wrong here
MFA Delete provides extra protection but is not required.
- ✗
Enable S3 Block Public Access
Why it's wrong here
This prevents public access but does not protect against deletion.
- ✓
Add a bucket policy that denies PutObject if the object is not encrypted with SSE-KMS
Why this is correct
This ensures all uploads use SSE-KMS.
- ✓
Enable S3 Versioning on the bucket
Why this is correct
Versioning allows recovery of deleted objects.
- ✗
Set default encryption to SSE-S3
Why it's wrong here
SSE-S3 does not meet the requirement for KMS encryption.
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.