The answer is that the user is denied access because the explicit Deny statement overrides the Allow for the 'secret/' prefix. This happens because AWS IAM policy evaluation logic is always "explicit Deny wins" — any Deny statement, even if it conflicts with an Allow, immediately blocks the action. In the AWS Certified Developer Associate DVA-C02 exam, this concept tests your understanding of IAM policy precedence: default implicit Deny, then Allow, then explicit Deny, which always overrides. A common trap is assuming an Allow can override a Deny, or that the Deny only applies to the root bucket. Remember the memory tip: "Deny is the final word — once it says no, no Allow can say yes."
DVA-C02 Troubleshooting and Optimization Practice Question
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. 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.
Refer to the exhibit. An IAM policy is attached to a user. The user tries to download an object from s3://my-bucket/secret/config.txt. What will happen?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The user is denied access because the Deny statement explicitly denies access to the 'secret/' prefix.
The Deny statement explicitly denies all s3 actions on the 'secret/' prefix. Deny statements override Allow statements. Option C is correct. Option A is wrong because the Deny is explicit. Option B is wrong because the Deny applies to the 'secret/' prefix. Option D is wrong because the Deny is not conditional.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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 user is denied access only if the bucket policy also denies access.
Why it's wrong here
The IAM policy alone denies access.
✗
The user can download the object because the Deny statement only applies to 's3:*' actions, not s3:GetObject.
Why it's wrong here
's3:*' includes s3:GetObject.
✗
The user can download the object because the Allow statement grants s3:GetObject on the bucket.
Why it's wrong here
The Deny statement overrides the Allow.
✓
The user is denied access because the Deny statement explicitly denies access to the 'secret/' prefix.
Why this is correct
Explicit Deny always overrides Allow.
Related concept
Standard ACLs match source addresses.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.
TExam Day Tips
→Check inbound versus outbound direction.
→Read the ACL from top to bottom.
→Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
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.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DVA-C02 ACL questions on filtering logic and placement.
Troubleshooting and Optimization — This question tests Troubleshooting and Optimization — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: The user is denied access because the Deny statement explicitly denies access to the 'secret/' prefix. — The Deny statement explicitly denies all s3 actions on the 'secret/' prefix. Deny statements override Allow statements. Option C is correct. Option A is wrong because the Deny is explicit. Option B is wrong because the Deny applies to the 'secret/' prefix. Option D is wrong because the Deny is not conditional.
What should I do if I get this DVA-C02 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related DVA-C02 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Question Discussion
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