- A
Apply an S3 bucket policy on each bucket that denies PutObject without encryption.
Why wrong: Bucket policies enforce at upload time, but cannot retroactively encrypt existing objects.
- B
Create an SCP that denies PutBucketAcl or PutBucketPolicy actions if the bucket does not have encryption enabled.
SCPs can restrict actions that create unencrypted buckets.
- C
Use AWS CloudTrail to monitor S3 API calls and alert on unencrypted bucket creation.
Why wrong: CloudTrail logs events but does not enforce encryption.
- D
Enable AWS Config managed rule s3-bucket-server-side-encryption-enabled to detect non-compliant buckets.
AWS Config rule detects buckets without encryption.
- E
Enable default encryption on all S3 buckets using the AWS S3 console or API.
Default encryption ensures new objects are encrypted automatically.
Quick Answer
The correct three steps are to enforce S3 encryption using a service control policy, AWS Config rules, and default encryption on all buckets. A service control policy at the organizational level can deny the creation of unencrypted S3 buckets, while AWS Config rules continuously evaluate existing buckets for compliance and trigger remediation if encryption is missing. Default encryption on each bucket ensures that any new objects uploaded are automatically encrypted at rest, even if the upload request does not specify encryption headers. On the SAP-C02 exam, this scenario tests your ability to combine preventive, detective, and corrective controls across multiple accounts, a common theme in organizational security design. A frequent trap is confusing bucket policies with default encryption—bucket policies enforce encryption at upload time but cannot fix objects already stored. Remember the mnemonic: SCP prevents, Config detects, Default encrypts.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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 company uses AWS Organizations to manage multiple accounts. The security team needs to ensure that all S3 buckets across the organization are encrypted at rest. Currently, some buckets are not encrypted. Which THREE steps should the team take to enforce encryption? (Select THREE.)
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
Create an SCP that denies PutBucketAcl or PutBucketPolicy actions if the bucket does not have encryption enabled.
Option A is correct because a service control policy can prevent creating unencrypted buckets. Option C is correct because AWS Config rules can detect non-compliant buckets. Option D is correct because S3 default encryption ensures new objects are encrypted. Option B is wrong because S3 bucket policies enforce encryption at upload time, not after creation. Option E is wrong because CloudTrail logs events but does not enforce encryption.
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.
- ✗
Apply an S3 bucket policy on each bucket that denies PutObject without encryption.
Why it's wrong here
Bucket policies enforce at upload time, but cannot retroactively encrypt existing objects.
- ✓
Create an SCP that denies PutBucketAcl or PutBucketPolicy actions if the bucket does not have encryption enabled.
Why this is correct
SCPs can restrict actions that create unencrypted buckets.
Related concept
Standard ACLs match source addresses.
- ✗
Use AWS CloudTrail to monitor S3 API calls and alert on unencrypted bucket creation.
Why it's wrong here
CloudTrail logs events but does not enforce encryption.
- ✓
Enable AWS Config managed rule s3-bucket-server-side-encryption-enabled to detect non-compliant buckets.
Why this is correct
AWS Config rule detects buckets without encryption.
Related concept
Standard ACLs match source addresses.
- ✓
Enable default encryption on all S3 buckets using the AWS S3 console or API.
Why this is correct
Default encryption ensures new objects are encrypted automatically.
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 SAP-C02 ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Create an SCP that denies PutBucketAcl or PutBucketPolicy actions if the bucket does not have encryption enabled. — Option A is correct because a service control policy can prevent creating unencrypted buckets. Option C is correct because AWS Config rules can detect non-compliant buckets. Option D is correct because S3 default encryption ensures new objects are encrypted. Option B is wrong because S3 bucket policies enforce encryption at upload time, not after creation. Option E is wrong because CloudTrail logs events but does not enforce encryption.
What should I do if I get this SAP-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 SAP-C02 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
2 more ways this is tested on SAP-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company uses AWS Organizations with multiple accounts. The security team wants to enforce that all S3 buckets are encrypted with AWS KMS and prohibit public access. Which TWO actions should the team take?
medium- A.Use AWS Config rules to automatically remediate non-compliant buckets.
- B.Enable AWS CloudTrail to monitor and automatically remediate non-compliant buckets.
- ✓ C.Create an SCP to deny s3:PutObject actions without the x-amz-server-side-encryption header set to aws:kms.
- D.Create an S3 bucket policy in each account to enforce encryption and block public access.
- ✓ E.Create an SCP to deny s3:PutBucketPublicAccessBlock and s3:PutBucketPolicy actions unless encryption is enabled.
Why C: Options B and D are correct. Service control policies (SCPs) can deny actions that do not meet encryption and public access conditions. Option A is wrong because resource-level policies are per bucket. Option C is wrong because CloudTrail cannot enforce. Option E is wrong because Config rules only detect, not enforce.
Variation 2. A company is using AWS Organizations with multiple accounts. The security team wants to ensure that all Amazon S3 buckets across the organization are encrypted at rest. Which TWO steps should the security team take to enforce this requirement?
easy- ✓ A.Create an AWS Config rule that checks for S3 bucket default encryption and auto-remediates using SSM Automation.
- ✓ B.Create a service control policy (SCP) that denies s3:PutObject unless the x-amz-server-side-encryption header is present.
- C.Use Amazon GuardDuty to monitor S3 data access patterns.
- D.Create an IAM role with permissions to encrypt S3 buckets and assign it to all users.
- E.Enable AWS CloudTrail to log all S3 API calls.
Why A: Option A is correct because AWS Config can be configured with a managed rule (e.g., s3-bucket-server-side-encryption-enabled) to detect buckets without default encryption, and an automatic remediation action using AWS Systems Manager (SSM) Automation can enforce encryption by applying the bucket's default encryption settings. Option B is correct because a service control policy (SCP) that denies s3:PutObject unless the x-amz-server-side-encryption header is present ensures that any object uploaded to S3 must include encryption headers, effectively enforcing encryption at the API level across all accounts in the organization.
Last reviewed: Jun 20, 2026
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