- A
Enable CloudTrail management events and configure an EventBridge rule to send notifications for PutBucketPolicy and PutKeyPolicy API calls, while also delivering CloudTrail logs to a dedicated S3 bucket for retention.
CloudTrail management events capture these policy-change API calls. EventBridge can create near-real-time alerts, and S3 provides durable central log retention for investigations.
- B
Rely on AWS Config resource snapshots only; use the snapshots to infer policy changes and generate alerts from the daily compliance summary reports.
Why wrong: Config summaries are not designed for rapid alerting and may miss timely detection windows. Snapshots alone are not as direct as API-call based detection.
- C
Enable S3 access logging on the affected buckets only; treat these logs as sufficient evidence for KMS key policy modifications.
Why wrong: S3 access logs focus on object and bucket request activity, not KMS key policy API changes. KMS policy changes are not represented reliably in S3 access logs.
- D
Turn on CloudWatch Logs for the S3 bucket and KMS key; alert on any log line containing the word 'policy' to detect changes.
Why wrong: CloudWatch Logs won’t automatically capture KMS or S3 policy-change API events as structured audit events. Keyword matching is unreliable and may miss changes.
Quick Answer
The answer is to enable CloudTrail management events and configure an EventBridge rule to send notifications for PutBucketPolicy and PutKeyPolicy API calls, while delivering logs to a dedicated S3 bucket. This design works because CloudTrail management events capture all S3 bucket policy and KMS key policy changes by default, and EventBridge can trigger near-real-time alerts within minutes for these specific API calls, satisfying the detect and alert requirement. Centralizing logs in a dedicated S3 bucket provides immutable retention for forensics. On the SAA-C03 exam, this scenario tests your understanding of detective controls versus preventive controls—a common trap is choosing AWS Config rules, which detect configuration drift but not real-time API calls. Remember: CloudTrail captures the action, EventBridge alerts on it, and S3 stores the evidence. Memory tip: "Trail catches the call, Bridge sends the ball, Bucket keeps it all."
SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. 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.
Your security team needs to detect and alert on any attempt to change sensitive policies, specifically S3 bucket policy changes and KMS key policy changes. The team wants alerts within minutes, and logs must be centrally retained for forensics. Which design best meets these detective control requirements using AWS-native services?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
Enable CloudTrail management events and configure an EventBridge rule to send notifications for PutBucketPolicy and PutKeyPolicy API calls, while also delivering CloudTrail logs to a dedicated S3 bucket for retention.
Option A is correct because CloudTrail management events capture all API calls for S3 bucket policies (PutBucketPolicy) and KMS key policies (PutKeyPolicy) by default, and EventBridge rules can trigger near-real-time alerts (within minutes) for these specific API calls. Additionally, delivering CloudTrail logs to a dedicated S3 bucket provides centralized, immutable retention for forensic analysis, meeting both the alerting and retention requirements.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable CloudTrail management events and configure an EventBridge rule to send notifications for PutBucketPolicy and PutKeyPolicy API calls, while also delivering CloudTrail logs to a dedicated S3 bucket for retention.
Why this is correct
CloudTrail management events capture these policy-change API calls. EventBridge can create near-real-time alerts, and S3 provides durable central log retention for investigations.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Rely on AWS Config resource snapshots only; use the snapshots to infer policy changes and generate alerts from the daily compliance summary reports.
Why it's wrong here
Config summaries are not designed for rapid alerting and may miss timely detection windows. Snapshots alone are not as direct as API-call based detection.
- ✗
Enable S3 access logging on the affected buckets only; treat these logs as sufficient evidence for KMS key policy modifications.
Why it's wrong here
S3 access logs focus on object and bucket request activity, not KMS key policy API changes. KMS policy changes are not represented reliably in S3 access logs.
- ✗
Turn on CloudWatch Logs for the S3 bucket and KMS key; alert on any log line containing the word 'policy' to detect changes.
Why it's wrong here
CloudWatch Logs won’t automatically capture KMS or S3 policy-change API events as structured audit events. Keyword matching is unreliable and may miss changes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse S3 access logs (which record data-plane operations) with CloudTrail management events (which record control-plane operations), leading them to choose Option C, or they mistakenly think AWS Config snapshots provide real-time alerts, when in fact they are periodic and lack API-level detail.
Trap categories for this question
Keyword trap
CloudWatch Logs won’t automatically capture KMS or S3 policy-change API events as structured audit events. Keyword matching is unreliable and may miss changes.
Detailed technical explanation
How to think about this question
CloudTrail management events include all control-plane operations (e.g., PutBucketPolicy, PutKeyPolicy) and are delivered to CloudWatch Logs or EventBridge within approximately 5-15 minutes of the API call. EventBridge rules use event pattern matching on the 'eventName' field to trigger SNS notifications or Lambda functions for immediate alerting, while CloudTrail logs stored in a dedicated S3 bucket can be encrypted with SSE-S3 or SSE-KMS and locked with S3 Object Lock for immutable retention, ensuring forensic integrity.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Secure Architectures — This question tests Design Secure Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable CloudTrail management events and configure an EventBridge rule to send notifications for PutBucketPolicy and PutKeyPolicy API calls, while also delivering CloudTrail logs to a dedicated S3 bucket for retention. — Option A is correct because CloudTrail management events capture all API calls for S3 bucket policies (PutBucketPolicy) and KMS key policies (PutKeyPolicy) by default, and EventBridge rules can trigger near-real-time alerts (within minutes) for these specific API calls. Additionally, delivering CloudTrail logs to a dedicated S3 bucket provides centralized, immutable retention for forensic analysis, meeting both the alerting and retention requirements.
What should I do if I get this SAA-C03 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Same concept, more angles
2 more ways this is tested on SAA-C03
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. Based on the exhibit, the security team needs to detect and alert on both successful and failed attempts to change S3 bucket policies and KMS key policies across the organization. Which solution best meets that requirement?
hard- ✓ A.Enable an organization trail for management events in all regions and create an EventBridge rule that matches PutBucketPolicy and PutKeyPolicy, then send alerts to SNS.
- B.Enable AWS Config in all accounts and use only a periodic compliance evaluation to alert when bucket or key policies drift.
- C.Use IAM Access Analyzer because it continuously blocks policy changes that would expose the resources publicly.
- D.Turn on S3 server access logging and KMS key rotation, because both services will capture policy modifications automatically.
Why A: Option A is correct because AWS CloudTrail management events capture all API calls that modify S3 bucket policies (PutBucketPolicy) and KMS key policies (PutKeyPolicy). By enabling an organization trail for all regions, you centralize these events across the entire AWS Organization. An Amazon EventBridge rule can then filter for these specific API calls and send alerts via Amazon SNS, meeting the requirement to detect both successful and failed attempts.
Variation 2. Based on the exhibit, the security team wants centralized detection and alerting for both successful and failed attempts to change S3 bucket policies and KMS key policies across multiple accounts. Which approach best meets the requirement?
hard- A.Enable S3 server access logging on each bucket and archive the logs in the security account.
- B.Use AWS Config rules only, because Config records every successful and failed API call automatically.
- ✓ C.Create an organization CloudTrail trail for management events and add EventBridge rules in the security account to alert on PutBucketPolicy and PutKeyPolicy events, including failed calls.
- D.Enable GuardDuty in every account and use its findings as the main source for policy change notifications.
Why C: Option C is correct because an organization CloudTrail trail captures management events (including PutBucketPolicy and PutKeyPolicy) across all accounts in the organization, and EventBridge rules in the security account can filter for both successful and failed API calls (using the `errorCode` field) to trigger centralized alerts. This provides the required centralized detection and alerting for policy changes across multiple accounts.
Last reviewed: Jun 11, 2026
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