- A
Use IAM roles in each account with cross-account access
Why wrong: Roles provide access but not fine-grained object-level control.
- B
Use Amazon CloudFront to serve the data
Why wrong: CloudFront does not provide access control.
- C
Use S3 access points with a policy per account
Access points allow separate policies for each account.
- D
Create a bucket policy with principal ARNs for each account
Why wrong: Bucket policies have size limits and are not scalable.
Question 691 of 1,786
Using S3 Access Points for Fine-Grained Cross-Account Access
This DEA-C01 practice question tests your understanding of data security and governance. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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
Option C is correct. 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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a bucket policy with principal ARNs for each account
Why it's wrong here
Bucket policies have size limits and are not scalable.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 |
What to study next
Got this wrong? Here's your next step.
Identify which DEA-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this DEA-C01 question test?
Data Security and Governance — This question tests Data Security and Governance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use S3 access points with a policy per account — Option C is correct. 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.
What should I do if I get this DEA-C01 question wrong?
Identify which DEA-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 20, 2026
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