DEA-C01 Data Security and Governance Practice Question
A company has a multi-account strategy using AWS Organizations. The data engineering team needs to share a central S3 bucket across multiple accounts while maintaining fine-grained access control. Which solution should be used?
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 access points with a policy per account
S3 access points allow you to create separate access points for each account with their own policies, enabling fine-grained access control while sharing the same bucket. This integrates with AWS Organizations to simplify policy management. Option A is incorrect because cross-account IAM roles grant full access to the role's permissions and lack object-level granularity. Option B is incorrect because CloudFront is a content delivery network, not an access control mechanism. Option D is incorrect because a bucket policy with principal ARNs for each account becomes difficult to manage as accounts scale, and it doesn't provide per-account fine-grained control like access points do.
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 IAM roles in each account with cross-account access
Why it's wrong here
Roles provide access but not fine-grained object-level control.
- ✗
Use Amazon CloudFront to serve the data
Why it's wrong here
CloudFront does not provide access control.
- ✓
Use S3 access points with a policy per account
Why this is correct
Access points allow separate policies for each account.
- ✗
Create a bucket policy with principal ARNs for each account
Why it's wrong here
Bucket policies have size limits and are not scalable.
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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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.