DEA-C01 Data Security and Governance Practice Question
A company uses S3 to store sensitive customer data. To prevent accidental public access, a data engineer needs to ensure that all S3 buckets block public access at the account level. Which AWS service should be used to enforce this policy?
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 an SCP in AWS Organizations to deny s3:PutBucketPublicAccessBlock
AWS Organizations with SCPs can centrally control permissions across all accounts, including blocking public access to S3 buckets. Option A is wrong because IAM policies are per-identity and not account-wide. Option B is wrong because S3 Block Public Access settings exist per bucket or account, but to enforce across all accounts, Organizations is needed. Option D is wrong because AWS Config can detect non-compliance but not enforce. Option C is correct.
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 S3 Block Public Access at the account level in the management account
Why it's wrong here
This only affects the management account, not member accounts.
- ✗
Create an IAM policy that denies s3:PutBucketPolicy
Why it's wrong here
IAM policies apply to users/roles, not account-wide enforcement; they don't block all public access settings.
- ✓
Use an SCP in AWS Organizations to deny s3:PutBucketPublicAccessBlock
Why this is correct
SCPs can enforce that no account can disable block public access, covering all accounts.
- ✗
Set up AWS Config rules to automatically remediate public buckets
Why it's wrong here
AWS Config detects but does not enforce; remediation requires additional automation.
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.