This DOP-C02 practice question tests your understanding of security and compliance. 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.
Which TWO actions should a DevOps engineer take to prevent an S3 bucket from being publicly accessible? (Choose two.)
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 bucket level.
Option B is correct because enabling S3 Block Public Access at the bucket level provides a centralized, override-proof mechanism to prevent any public access to the bucket, regardless of other policies or ACLs. This setting blocks all public access by default, including access granted via bucket policies, access control lists (ACLs), or object-level permissions, and cannot be overridden by any other S3 configuration.
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.
✗
Enable S3 Versioning on the bucket.
Why it's wrong here
Versioning does not affect public access.
✓
Enable S3 Block Public Access at the bucket level.
Why this is correct
This blocks all public access to the bucket.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable S3 Server Access Logging.
Why it's wrong here
Logging does not prevent public access.
✓
Configure a bucket policy that explicitly denies anonymous access.
Why this is correct
A Deny for anonymous access prevents public access.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure a lifecycle policy to delete objects.
Why it's wrong here
Lifecycle policies do not affect public access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think enabling S3 Versioning or Server Access Logging can prevent public access, but these features are designed for data protection and auditing, not for access control enforcement.
Detailed technical explanation
How to think about this question
S3 Block Public Access settings operate at the bucket and account level, and when enabled, they override any bucket policies or ACLs that would otherwise grant public access. For example, even if a bucket policy explicitly allows s3:GetObject for 'Principal': '*', enabling Block Public Access will deny that access. This is enforced by the S3 authorization system before any policy evaluation, making it a critical security control for preventing data exposure.
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.
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
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Security and Compliance — This question tests Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable S3 Block Public Access at the bucket level. — Option B is correct because enabling S3 Block Public Access at the bucket level provides a centralized, override-proof mechanism to prevent any public access to the bucket, regardless of other policies or ACLs. This setting blocks all public access by default, including access granted via bucket policies, access control lists (ACLs), or object-level permissions, and cannot be overridden by any other S3 configuration.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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