Quick Answer
The answer is AWS Lambda, AWS Config, and Amazon EventBridge. This combination works because AWS Config continuously evaluates your S3 bucket configurations against a rule that checks for encryption at rest, and when it detects a noncompliant bucket, it can send an event to Amazon EventBridge, which then triggers an AWS Lambda function to automatically apply the required encryption. On the AWS Certified Security Specialty SCS-C02 exam, this scenario tests your understanding of how to build a serverless, event-driven remediation pipeline rather than relying on manual or per-bucket settings. A common trap is choosing S3 default encryption or AWS CloudTrail—default encryption is a preventive setting per bucket, not an automatic remediation across all buckets, while CloudTrail only logs actions. Remember the three-step chain: Detect (Config), Route (EventBridge), Fix (Lambda).
This SCS-C02 practice question tests your understanding of management and security governance. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 wants to ensure that all Amazon S3 buckets are encrypted at rest. Which THREE services can be used together to automatically remediate unencrypted S3 buckets?
Amazon S3 default encryption
Why wrong: Default encryption is per-bucket and not automatic remediation.
AWS CloudTrail
Why wrong: CloudTrail logs API calls but does not perform remediation.
Amazon EventBridge
EventBridge can route Config compliance changes to trigger remediation.
AWS Config
AWS Config rules can detect non-compliant resources.
AWS Lambda
Lambda can run custom logic to enable encryption on buckets.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Amazon EventBridge
Options A, C, and D are correct. AWS Config can detect unencrypted buckets (A), Amazon EventBridge can trigger a remediation action (C), and AWS Lambda can execute the remediation (D). Option B is wrong because S3 itself does not automatically remediate; it can be configured with default encryption but that is per-bucket. Option E is wrong because CloudTrail is for auditing, not remediation.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Amazon S3 default encryption
Why it's wrong here
Default encryption is per-bucket and not automatic remediation.
AWS CloudTrail
Why it's wrong here
CloudTrail logs API calls but does not perform remediation.
Amazon EventBridge
Why this is correct
EventBridge can route Config compliance changes to trigger remediation.
Related concept
Read the scenario before looking for a memorised answer.
AWS Config
Why this is correct
AWS Config rules can detect non-compliant resources.
Related concept
Read the scenario before looking for a memorised answer.
AWS Lambda
Why this is correct
Lambda can run custom logic to enable encryption on buckets.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which SCS-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Management and Security Governance — study guide chapter
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FAQ
Management and Security Governance — This question tests Management and Security Governance — Read the scenario before looking for a memorised answer..
The correct answer is: Amazon EventBridge — Options A, C, and D are correct. AWS Config can detect unencrypted buckets (A), Amazon EventBridge can trigger a remediation action (C), and AWS Lambda can execute the remediation (D). Option B is wrong because S3 itself does not automatically remediate; it can be configured with default encryption but that is per-bucket. Option E is wrong because CloudTrail is for auditing, not remediation.
Identify which SCS-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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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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