- A
Use AWS CloudTrail to monitor bucket creation and trigger a Lambda function to remediate noncompliant buckets.
Why wrong: This is reactive, not preventive. The bucket could be created without encryption and exposed temporarily.
- B
Create an IAM policy in each account that denies s3:CreateBucket unless encryption is specified and public access is blocked.
Why wrong: This would require manual deployment to each account and does not prevent creation if the user has admin rights. Also, it cannot be enforced centrally.
- C
Apply a service control policy (SCP) to the root organizational unit that denies s3:CreateBucket unless the request includes the x-amz-server-side-encryption header and the PublicAccessBlockConfiguration.
SCPs can be applied at the organization root or to specific OUs to enforce preventive controls across all accounts. This SCP condition ensures that any CreateBucket request must include the required parameters.
- D
Use AWS Config rules with automatic remediation to delete or remediate noncompliant buckets after creation.
Why wrong: This is reactive and could lead to data loss if a bucket is created unintentionally without encryption.
DOP-C02 Security and Compliance Practice Question
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.
A company uses AWS Organizations with multiple accounts. The Security team needs to enforce that all newly created S3 buckets in any account are configured with server-side encryption (SSE-S3 or SSE-KMS) and block public access. Which approach should be used?
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
Apply a service control policy (SCP) to the root organizational unit that denies s3:CreateBucket unless the request includes the x-amz-server-side-encryption header and the PublicAccessBlockConfiguration.
Service control policies (SCPs) in AWS Organizations can be used to deny actions that do not include encryption settings or that allow public access. Option A is wrong because IAM policies are account-specific and cannot be applied globally across all accounts from a central location. Option B is wrong because CloudTrail cannot enforce configurations. Option D is wrong because Config rules can detect noncompliant buckets but not prevent creation.
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.
- ✗
Use AWS CloudTrail to monitor bucket creation and trigger a Lambda function to remediate noncompliant buckets.
Why it's wrong here
This is reactive, not preventive. The bucket could be created without encryption and exposed temporarily.
- ✗
Create an IAM policy in each account that denies s3:CreateBucket unless encryption is specified and public access is blocked.
Why it's wrong here
This would require manual deployment to each account and does not prevent creation if the user has admin rights. Also, it cannot be enforced centrally.
- ✓
Apply a service control policy (SCP) to the root organizational unit that denies s3:CreateBucket unless the request includes the x-amz-server-side-encryption header and the PublicAccessBlockConfiguration.
Why this is correct
SCPs can be applied at the organization root or to specific OUs to enforce preventive controls across all accounts. This SCP condition ensures that any CreateBucket request must include the required parameters.
Related concept
Standard ACLs match source addresses.
- ✗
Use AWS Config rules with automatic remediation to delete or remediate noncompliant buckets after creation.
Why it's wrong here
This is reactive and could lead to data loss if a bucket is created unintentionally without encryption.
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 DOP-C02 ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Security and Compliance — This question tests Security and Compliance — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Apply a service control policy (SCP) to the root organizational unit that denies s3:CreateBucket unless the request includes the x-amz-server-side-encryption header and the PublicAccessBlockConfiguration. — Service control policies (SCPs) in AWS Organizations can be used to deny actions that do not include encryption settings or that allow public access. Option A is wrong because IAM policies are account-specific and cannot be applied globally across all accounts from a central location. Option B is wrong because CloudTrail cannot enforce configurations. Option D is wrong because Config rules can detect noncompliant buckets but not prevent creation.
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.
What is the key concept behind this question?
Standard ACLs match source addresses.
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Last reviewed: Jun 20, 2026
This DOP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DOP-C02 exam.
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