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.
Exhibit
Current audit configuration:
- AWS Config recorder is enabled in one account only
- CloudTrail trail captures management events in us-east-1 only
- No EventBridge rules or SNS alerts are configured
Recent activity:
{
"eventSource": "s3.amazonaws.com",
"eventName": "PutBucketPolicy",
"errorCode": "AccessDenied",
"userIdentity": {"arn": "arn:aws:iam::999900001111:user/temp-admin"}
}
{
"eventSource": "kms.amazonaws.com",
"eventName": "PutKeyPolicy",
"errorCode": null,
"userIdentity": {"arn": "arn:aws:iam::999900001111:role/SecurityOps"}
}
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?
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.
Current audit configuration:
- AWS Config recorder is enabled in one account only
- CloudTrail trail captures management events in us-east-1 only
- No EventBridge rules or SNS alerts are configured
Recent activity:
{
"eventSource": "s3.amazonaws.com",
"eventName": "PutBucketPolicy",
"errorCode": "AccessDenied",
"userIdentity": {"arn": "arn:aws:iam::999900001111:user/temp-admin"}
}
{
"eventSource": "kms.amazonaws.com",
"eventName": "PutKeyPolicy",
"errorCode": null,
"userIdentity": {"arn": "arn:aws:iam::999900001111:role/SecurityOps"}
}
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.
CloudTrail management events record API activity, including failed attempts, and an organization trail provides coverage across accounts and Regions. EventBridge can react to those API calls in near real time and route notifications to SNS. This is the clean detective-control pattern for policy-change auditing.
B
Enable AWS Config in all accounts and use only a periodic compliance evaluation to alert when bucket or key policies drift.
Why wrong: AWS Config is useful for detecting configuration drift, but it is not the best tool for alerting on every policy-change attempt, especially failed API calls. The requirement explicitly asks for attempts and timely alerting, which CloudTrail and EventBridge handle more directly.
C
Use IAM Access Analyzer because it continuously blocks policy changes that would expose the resources publicly.
Why wrong: Access Analyzer can identify broad resource-access patterns and generate findings, but it does not block or alert on every bucket policy or KMS key policy API call. It is not a real-time audit trail for successful and failed administrative actions.
D
Turn on S3 server access logging and KMS key rotation, because both services will capture policy modifications automatically.
Why wrong: S3 server access logging records object-level access to buckets, not administrative policy changes. KMS key rotation changes cryptographic material, not audit coverage for policy updates. Neither service alone satisfies the requirement to alert on policy-change attempts across the organization.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
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.
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.
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 an organization trail for management events in all regions and create an EventBridge rule that matches PutBucketPolicy and PutKeyPolicy, then send alerts to SNS.
Why this is correct
CloudTrail management events record API activity, including failed attempts, and an organization trail provides coverage across accounts and Regions. EventBridge can react to those API calls in near real time and route notifications to SNS. This is the clean detective-control pattern for policy-change auditing.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable AWS Config in all accounts and use only a periodic compliance evaluation to alert when bucket or key policies drift.
Why it's wrong here
AWS Config is useful for detecting configuration drift, but it is not the best tool for alerting on every policy-change attempt, especially failed API calls. The requirement explicitly asks for attempts and timely alerting, which CloudTrail and EventBridge handle more directly.
✗
Use IAM Access Analyzer because it continuously blocks policy changes that would expose the resources publicly.
Why it's wrong here
Access Analyzer can identify broad resource-access patterns and generate findings, but it does not block or alert on every bucket policy or KMS key policy API call. It is not a real-time audit trail for successful and failed administrative actions.
✗
Turn on S3 server access logging and KMS key rotation, because both services will capture policy modifications automatically.
Why it's wrong here
S3 server access logging records object-level access to buckets, not administrative policy changes. KMS key rotation changes cryptographic material, not audit coverage for policy updates. Neither service alone satisfies the requirement to alert on policy-change attempts across the organization.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS Config's compliance checks or IAM Access Analyzer's policy analysis with real-time API call monitoring, failing to realize that only CloudTrail management events capture every attempt (including failures) to change policies.
Detailed technical explanation
How to think about this question
CloudTrail management events include all data plane and control plane API calls, such as PutBucketPolicy and PutKeyPolicy, and are logged by default when a trail is enabled. EventBridge can match these events using a pattern that specifies the event source (e.g., 'aws.s3' or 'aws.kms') and the event name, allowing real-time filtering. Failed attempts are captured as events with an 'errorCode' field, so the EventBridge rule can be configured to match both successful and failed calls by not filtering on that field.
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 an organization trail for management events in all regions and create an EventBridge rule that matches PutBucketPolicy and PutKeyPolicy, then send alerts to SNS. — 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.
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.
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