- A
Update the CodeDeploy deployment action to use a bucket policy and disable ACLs.
Bucket policies are the recommended way to manage permissions when ACLs are off.
- B
Make the S3 bucket publicly accessible to allow CodeDeploy to write objects.
Why wrong: Public access is a security risk.
- C
Add a step in CodeBuild to copy the artifacts to the S3 bucket using the AWS CLI.
Why wrong: This bypasses CodeDeploy but does not fix the root cause.
- D
Change the Object Ownership setting to 'ObjectWriter' to enable ACLs.
Why wrong: This reduces security by allowing ACLs.
Question 1,152 of 1,750
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. 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.
A company uses AWS CodePipeline to deploy a static website to an S3 bucket. The pipeline has a Source stage (GitHub), a Build stage (CodeBuild), and a Deploy stage (CodeDeploy). The deployment fails intermittently with the error: 'Bucket does not allow ACLs'. The S3 bucket is configured to use the 'bucket-owner-enforced' setting for Object Ownership. The team wants to resolve the failure while maintaining security best practices. What should the team do?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
✓
Update the CodeDeploy deployment action to use a bucket policy and disable ACLs.
The error occurs because the S3 bucket uses the 'bucket-owner-enforced' Object Ownership setting, which disables ACLs. AWS CodeDeploy's default deployment action attempts to set ACLs on deployed objects, causing the failure. The correct solution is option A: configure the CodeDeploy deployment action to use a bucket policy instead of ACLs. This resolves the error while maintaining security best practices by keeping ACLs disabled. Option B (making the bucket public) is insecure. Option C (adding a CodeBuild step) does not address the root cause. Option D (changing Object Ownership to 'ObjectWriter') re-enables ACLs but is not recommended as it weakens ownership control and does not follow current best practices.
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.
- ✓
Update the CodeDeploy deployment action to use a bucket policy and disable ACLs.
Why this is correct
Bucket policies are the recommended way to manage permissions when ACLs are off.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Standard ACLs match source addresses.
- ✗
Make the S3 bucket publicly accessible to allow CodeDeploy to write objects.
Why it's wrong here
Public access is a security risk.
- ✗
Add a step in CodeBuild to copy the artifacts to the S3 bucket using the AWS CLI.
Why it's wrong here
This bypasses CodeDeploy but does not fix the root cause.
- ✗
Change the Object Ownership setting to 'ObjectWriter' to enable ACLs.
Why it's wrong here
This reduces security by allowing ACLs.
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.
Visual reference
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 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 DOP-C02 ACL questions on filtering logic and placement.
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Configuration Management and IaC — study guide chapter
Learn the concepts, then practise the questions
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Configuration Management and IaC practice questions
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Configuration Management and IaC — This question tests Configuration Management and IaC — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Update the CodeDeploy deployment action to use a bucket policy and disable ACLs. — The error occurs because the S3 bucket uses the 'bucket-owner-enforced' Object Ownership setting, which disables ACLs. AWS CodeDeploy's default deployment action attempts to set ACLs on deployed objects, causing the failure. The correct solution is option A: configure the CodeDeploy deployment action to use a bucket policy instead of ACLs. This resolves the error while maintaining security best practices by keeping ACLs disabled. Option B (making the bucket public) is insecure. Option C (adding a CodeBuild step) does not address the root cause. Option D (changing Object Ownership to 'ObjectWriter') re-enables ACLs but is not recommended as it weakens ownership control and does not follow current best practices.
What should I do if I get this DOP-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 DOP-C02 ACL questions on filtering logic and placement.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
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