This DVA-C02 practice question tests your understanding of security. 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 developer is configuring an S3 bucket to host a static website. The bucket policy allows public read access. However, users receive a 403 Forbidden error when accessing the website. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The bucket has 'Block all public access' settings enabled.
Option C is correct because the 'Block all public access' settings in the S3 bucket's Permissions tab override any bucket policy that grants public read access. Even if the bucket policy explicitly allows s3:GetObject for Principal "*", enabling any of the four block public access settings (especially 'Block public access to buckets and objects granted through new public bucket policies' or 'Block public and cross-account access to buckets and objects through any public bucket policies') will cause S3 to reject all anonymous requests, resulting in a 403 Forbidden error when accessing the static website endpoint.
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.
✗
The bucket is located in a different AWS region than the website endpoint.
Why it's wrong here
S3 website endpoints are region-specific; the bucket must be in the same region as the endpoint.
✗
The bucket name does not match the domain name.
Why it's wrong here
Custom domain with Route 53 can be mapped to an S3 website endpoint regardless of bucket name.
✓
The bucket has 'Block all public access' settings enabled.
Why this is correct
Block public access settings override bucket policies and deny public access.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The bucket is not configured with CloudFront as a content delivery network.
Why it's wrong here
CloudFront is not required for S3 static website hosting.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume a bucket policy granting public read access is sufficient for static website hosting, overlooking that S3's Block Public Access settings act as a separate, overriding permission layer that can silently deny all public access even when the bucket policy is correctly configured.
Detailed technical explanation
How to think about this question
The S3 Block Public Access feature is evaluated before the bucket policy; if any of the four settings (e.g., 'Block public access to buckets and objects granted through new public bucket policies') is enabled, S3 immediately denies any request that would be allowed by a public bucket policy, regardless of the policy's content. This is implemented at the S3 control plane level, meaning the bucket policy evaluation never occurs for anonymous requests. In real-world scenarios, developers often enable these settings as a security best practice (e.g., to prevent accidental data exposure) and then forget they are active, leading to confusion when a seemingly permissive bucket policy still returns 403 errors.
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 — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The bucket has 'Block all public access' settings enabled. — Option C is correct because the 'Block all public access' settings in the S3 bucket's Permissions tab override any bucket policy that grants public read access. Even if the bucket policy explicitly allows s3:GetObject for Principal "*", enabling any of the four block public access settings (especially 'Block public access to buckets and objects granted through new public bucket policies' or 'Block public and cross-account access to buckets and objects through any public bucket policies') will cause S3 to reject all anonymous requests, resulting in a 403 Forbidden error when accessing the static website endpoint.
What should I do if I get this DVA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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