SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. 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 with multiple accounts. The security team wants to ensure that all CloudTrail trails are enabled in all accounts and log to a central S3 bucket. What is the MOST efficient way to enforce this?
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 StackSets to deploy a CloudTrail template to all accounts.
Option C is correct because AWS CloudFormation StackSets can deploy CloudTrail across all accounts in an organization. Option A is wrong because Config aggregator does not deploy resources. Option B is wrong because Service Control Policies (SCPs) can deny disabling CloudTrail but not enable it. Option D is wrong because Lambda functions need to be triggered and are less efficient.
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 Lambda to check each account and enable CloudTrail if missing.
Why it's wrong here
Lambda approach is possible but less efficient and reliable than StackSets.
✗
Use AWS Config aggregator to verify compliance and send alerts.
Why it's wrong here
Config aggregator only aggregates compliance data, does not deploy resources.
✗
Create a service control policy (SCP) that requires CloudTrail.
Why it's wrong here
SCPs can prevent disabling but cannot enable CloudTrail.
✓
Use AWS CloudFormation StackSets to deploy a CloudTrail template to all accounts.
Why this is correct
StackSets can deploy and manage resources across accounts.
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 SCS-C02 ACL questions on filtering logic and placement.
Security Logging and Monitoring — This question tests Security Logging and Monitoring — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Use AWS CloudFormation StackSets to deploy a CloudTrail template to all accounts. — Option C is correct because AWS CloudFormation StackSets can deploy CloudTrail across all accounts in an organization. Option A is wrong because Config aggregator does not deploy resources. Option B is wrong because Service Control Policies (SCPs) can deny disabling CloudTrail but not enable it. Option D is wrong because Lambda functions need to be triggered and are less efficient.
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.
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Question Discussion
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