- A
Enable server access logging on the bucket
Why wrong: Access logging records requests but does not prevent public exposure.
- B
Enable S3 Transfer Acceleration
Why wrong: Transfer Acceleration improves upload performance but does not enforce private access.
- C
Create an IAM policy that denies s3:GetObject to anonymous users
Why wrong: An IAM policy alone does not protect against every public ACL or bucket policy mistake.
- D
Enable S3 Block Public Access at the account or bucket level
S3 Block Public Access prevents public ACLs and public bucket policies from exposing the bucket.
Question 507 of 1,040
SAA-C03 S3 Block Public Access Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: s3 Block Public Access. 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 solutions architect is designing an S3 bucket for a healthcare document service. The objects must never be publicly accessible, even if a developer later adds an overly broad bucket policy. What should the architect configure? The design must avoid adding custom operational scripts.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"never"Why it matters: Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
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
✓
Enable S3 Block Public Access at the account or bucket level
S3 Block Public Access provides a definitive override that prevents any public access to S3 objects, regardless of bucket policies or ACLs. By enabling this setting at the account or bucket level, the architect ensures that even if a developer later attaches an overly permissive bucket policy, the objects remain inaccessible to anonymous users. This meets the requirement without requiring custom operational scripts.
Key principle: S3 Block Public Access
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 server access logging on the bucket
Why it's wrong here
Access logging records requests but does not prevent public exposure.
- ✗
Enable S3 Transfer Acceleration
Why it's wrong here
Transfer Acceleration improves upload performance but does not enforce private access.
- ✗
Create an IAM policy that denies s3:GetObject to anonymous users
Why it's wrong here
An IAM policy alone does not protect against every public ACL or bucket policy mistake.
- ✓
Enable S3 Block Public Access at the account or bucket level
Why this is correct
S3 Block Public Access prevents public ACLs and public bucket policies from exposing the bucket.
Clue confirmation
The clue word "never" in the question point toward this answer.
Related concept
S3 Block Public Access
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often think an IAM policy can block anonymous access, but IAM policies do not apply to unauthenticated principals; only bucket policies or S3 Block Public Access can effectively deny anonymous access.
Detailed technical explanation
How to think about this question
S3 Block Public Public Access settings (BlockPublicAcls, IgnorePublicAcls, BlockPublicPolicy, RestrictPublicBuckets) are enforced at the S3 API layer before any bucket policy or ACL evaluation. This means that even if a bucket policy grants s3:GetObject to 'Principal: *', the request is denied at the service level. In a real-world scenario, a healthcare organization might enable these settings at the account level to prevent any accidental exposure of PHI across all buckets, ensuring compliance with HIPAA without relying on individual bucket configurations.
KKey Concepts to Remember
- S3 Block Public Access
- Bucket Policy
- IAM Policy
- Preventative Control
TExam Day Tips
- 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
S3 Block Public Access
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.
Review s3 Block Public Access, then practise related SAA-C03 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Secure Architectures — This question tests Design Secure Architectures — S3 Block Public Access.
What is the correct answer to this question?
The correct answer is: Enable S3 Block Public Access at the account or bucket level — S3 Block Public Access provides a definitive override that prevents any public access to S3 objects, regardless of bucket policies or ACLs. By enabling this setting at the account or bucket level, the architect ensures that even if a developer later attaches an overly permissive bucket policy, the objects remain inaccessible to anonymous users. This meets the requirement without requiring custom operational scripts.
What should I do if I get this SAA-C03 question wrong?
Review s3 Block Public Access, then practise related SAA-C03 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "never". Absolute qualifier. True only if the statement has zero exceptions — be cautious of options that seem obvious but break down in edge cases.
What is the key concept behind this question?
S3 Block Public Access
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Last reviewed: Jun 11, 2026
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