- A
Change the KMS key policy to require that any request to decrypt data must come from the Lake Formation service role.
Why wrong: KMS key policies do not control access to Lake Formation resources.
- B
Revoke the 'lakeformation:GetDataAccess' permission from all IAM users and groups, and require that access be granted only through Lake Formation permissions.
This ensures that only Lake Formation permissions control data access.
- C
Remove the IAM policy that grants 'lakeformation:GetDataAccess' from the specific user and ensure Lake Formation permissions are correctly set.
Why wrong: This only addresses one user; other users might still have similar IAM policies.
- D
Add an S3 bucket policy that denies all principals except the Lake Formation service role.
Why wrong: This would break legitimate access through Lake Formation and is not a scalable solution.
DEA-C01 Data Security and Governance Practice Question
This DEA-C01 practice question tests your understanding of data security and governance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 healthcare organization uses AWS Lake Formation to manage a data lake in Amazon S3. The data lake contains sensitive patient information that must be encrypted at rest. The organization uses AWS KMS with a customer-managed key (CMK) for encryption. Recently, the security team noticed that a new IAM user was able to query the data lake using Amazon Athena without explicit permissions in Lake Formation. The data lake administrator suspects that the IAM user might have been granted access through an IAM policy that allows 'lakeformation:GetDataAccess' without proper resource restrictions. The organization wants to enforce that only Lake Formation permissions control access to the data lake, and IAM policies should not grant access directly. What should they do?
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
Revoke the 'lakeformation:GetDataAccess' permission from all IAM users and groups, and require that access be granted only through Lake Formation permissions.
Option B is correct because revoking the 'lakeformation:GetDataAccess' permission from all IAM users and groups ensures that only Lake Formation permissions control access to the data lake. This prevents IAM policies from bypassing Lake Formation's fine-grained access control. Option A is wrong because changing the KMS key policy would not address the IAM policy issue; KMS controls encryption, not access permissions. Option C is wrong because removing the policy from a single user does not prevent other users from having similar permissions; a broader revocation is needed. Option D is wrong because S3 bucket policies would still allow direct S3 access, bypassing Lake Formation's controls.
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.
- ✗
Change the KMS key policy to require that any request to decrypt data must come from the Lake Formation service role.
Why it's wrong here
KMS key policies do not control access to Lake Formation resources.
- ✓
Revoke the 'lakeformation:GetDataAccess' permission from all IAM users and groups, and require that access be granted only through Lake Formation permissions.
Why this is correct
This ensures that only Lake Formation permissions control data access.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Remove the IAM policy that grants 'lakeformation:GetDataAccess' from the specific user and ensure Lake Formation permissions are correctly set.
Why it's wrong here
This only addresses one user; other users might still have similar IAM policies.
- ✗
Add an S3 bucket policy that denies all principals except the Lake Formation service role.
Why it's wrong here
This would break legitimate access through Lake Formation and is not a scalable solution.
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.
Trap categories for this question
Similar concept trap
This only addresses one user; other users might still have similar IAM policies.
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: Revoke the 'lakeformation:GetDataAccess' permission from all IAM users and groups, and require that access be granted only through Lake Formation permissions. — Option B is correct because revoking the 'lakeformation:GetDataAccess' permission from all IAM users and groups ensures that only Lake Formation permissions control access to the data lake. This prevents IAM policies from bypassing Lake Formation's fine-grained access control. Option A is wrong because changing the KMS key policy would not address the IAM policy issue; KMS controls encryption, not access permissions. Option C is wrong because removing the policy from a single user does not prevent other users from having similar permissions; a broader revocation is needed. Option D is wrong because S3 bucket policies would still allow direct S3 access, bypassing Lake Formation's controls.
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.
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Last reviewed: Jun 20, 2026
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