- A
Use AWS Service Catalog to enforce encryption
Why wrong: Service Catalog enforces governance on provisioned products, but it does not directly validate CloudFormation templates for encryption. It requires products to be created from a portfolio, which does not cover all CloudFormation stacks.
- B
Use AWS CloudFormation Guard to validate templates
AWS CloudFormation Guard allows you to define rules to validate templates before deployment, ensuring encryption is configured on S3 buckets.
- C
Enable AWS CloudTrail to detect unencrypted buckets
Why wrong: AWS CloudTrail records API calls but does not prevent or enforce resource configurations.
- D
Create an SCP to deny creation of unencrypted S3 buckets
Why wrong: SCPs apply to accounts and OUs and can deny actions based on conditions, but they cannot enforce specific resource configurations like bucket encryption at the template level. The enforcement is better done through template validation.
AWS CloudFormation Guard: Enforce S3 Encryption in Templates
This SCS-C02 practice question tests your understanding of management and security governance. 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 is using AWS CloudFormation to deploy infrastructure. The security team wants to enforce that all S3 buckets created by CloudFormation have encryption enabled. Which approach should be used to enforce this policy?
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
Use AWS CloudFormation Guard to validate templates
Option B is correct because AWS CloudFormation Guard can validate templates before deployment to ensure encryption is configured. Option A is wrong because Service Catalog enforces governance on provisioned products, but does not directly validate CloudFormation templates for encryption. Option C is wrong because CloudTrail detects but does not enforce. Option D is wrong because SCPs apply at the account level and cannot enforce specific resource configurations like bucket encryption within a template.
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 Service Catalog to enforce encryption
Why it's wrong here
Service Catalog enforces governance on provisioned products, but it does not directly validate CloudFormation templates for encryption. It requires products to be created from a portfolio, which does not cover all CloudFormation stacks.
- ✓
Use AWS CloudFormation Guard to validate templates
Why this is correct
AWS CloudFormation Guard allows you to define rules to validate templates before deployment, ensuring encryption is configured on S3 buckets.
Related concept
Standard ACLs match source addresses.
- ✗
Enable AWS CloudTrail to detect unencrypted buckets
Why it's wrong here
AWS CloudTrail records API calls but does not prevent or enforce resource configurations.
- ✗
Create an SCP to deny creation of unencrypted S3 buckets
Why it's wrong here
SCPs apply to accounts and OUs and can deny actions based on conditions, but they cannot enforce specific resource configurations like bucket encryption at the template level. The enforcement is better done through template validation.
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.
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 SCS-C02 ACL questions on filtering logic and placement.
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Management and Security Governance — study guide chapter
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FAQ
Questions learners often ask
What does this SCS-C02 question test?
Management and Security Governance — This question tests Management and Security Governance — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Use AWS CloudFormation Guard to validate templates — Option B is correct because AWS CloudFormation Guard can validate templates before deployment to ensure encryption is configured. Option A is wrong because Service Catalog enforces governance on provisioned products, but does not directly validate CloudFormation templates for encryption. Option C is wrong because CloudTrail detects but does not enforce. Option D is wrong because SCPs apply at the account level and cannot enforce specific resource configurations like bucket encryption within a template.
What should I do if I get this SCS-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 SCS-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
1 more ways this is tested on SCS-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 wants to use AWS CloudFormation to manage infrastructure. The security team requires that all templates are scanned for security vulnerabilities before deployment. Which service should be integrated into the pipeline?
easy- A.Amazon Inspector
- ✓ B.AWS CloudFormation Guard
- C.AWS Config
- D.AWS Shield Advanced
Why B: AWS CloudFormation Guard (cfn-guard) is a policy-as-code tool that allows you to define rules to validate CloudFormation templates against security best practices before deployment. It integrates into CI/CD pipelines to enforce compliance with organizational policies, such as ensuring encryption is enabled or public access is restricted, directly addressing the requirement to scan templates for security vulnerabilities.
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Last reviewed: Jun 20, 2026
This SCS-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 SCS-C02 exam.
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