The answer is to configure CloudFormation stack notifications to send events to an Amazon SNS topic, or to use Amazon CloudWatch Events (now Amazon EventBridge) to capture the CloudFormation stack state change notification. Both methods work because CloudFormation emits real-time events for every state transition, including ROLLBACK_IN_PROGRESS; SNS provides direct push notifications, while EventBridge allows you to match the specific 'CloudFormation Stack Status Change' event pattern and route it to SNS, Lambda, or other targets. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this tests your understanding of operational monitoring and event-driven responses—a common trap is thinking only SNS works, but EventBridge is the more flexible, exam-favored method for filtering specific states. Remember the mnemonic: "SNS for simple, Events for smart"—if you need to filter by a specific state like ROLLBACK_IN_PROGRESS, EventBridge is the smarter choice.
SOA-C02 Monitoring, Logging, and Remediation Practice Question
This SOA-C02 practice question tests your understanding of monitoring, logging, and remediation. 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 CloudFormation to deploy infrastructure. The operations team wants to be notified when a stack enters a ROLLBACK_IN_PROGRESS state. Which TWO methods can achieve this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create an Amazon CloudWatch Events rule that matches the CloudFormation stack status change.
Option B is correct because Amazon CloudWatch Events (now Amazon EventBridge) can capture CloudFormation stack status changes, including ROLLBACK_IN_PROGRESS, by matching the 'CloudFormation Stack Status Change' event pattern. This allows you to trigger a notification action (e.g., via SNS or Lambda) in real time when the stack enters that state.
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.
✗
Use AWS Config rules to evaluate the stack state.
Why it's wrong here
AWS Config does not monitor CloudFormation stack states.
✓
Create an Amazon CloudWatch Events rule that matches the CloudFormation stack status change.
Why this is correct
CloudFormation emits events to CloudWatch Events for stack status changes.
Related concept
Read the scenario before looking for a memorised answer.
✗
Configure a CloudWatch Logs subscription filter to detect the stack state.
Why it's wrong here
CloudFormation stack events are not logged to CloudWatch Logs by default.
✗
Create a CloudTrail trail and monitor the UpdateStack API call.
Why it's wrong here
This would require additional logic to parse the API call and determine the stack state.
✓
Configure CloudFormation stack notifications to send events to an Amazon SNS topic.
Why this is correct
CloudFormation can send stack events directly to an SNS topic.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse CloudTrail API logging (which records the API call but not the asynchronous state transition) with event-driven notifications, or assume CloudWatch Logs subscription filters can parse CloudFormation events, when in fact CloudFormation does not write stack state changes to CloudWatch Logs.
Detailed technical explanation
How to think about this question
CloudFormation stack notifications are sent directly to an SNS topic when you specify the 'NotificationARNs' property in the stack creation or update; this includes events like ROLLBACK_IN_PROGRESS. CloudWatch Events/EventBridge uses a predefined event pattern for CloudFormation resource status changes, which includes the 'stack-id' and 'resource-status' fields, allowing fine-grained filtering without polling. Both methods provide near-instantaneous notification, but the SNS approach requires the topic to be configured at stack creation, while EventBridge can be set up retroactively.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
Monitoring, Logging, and Remediation — This question tests Monitoring, Logging, and Remediation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create an Amazon CloudWatch Events rule that matches the CloudFormation stack status change. — Option B is correct because Amazon CloudWatch Events (now Amazon EventBridge) can capture CloudFormation stack status changes, including ROLLBACK_IN_PROGRESS, by matching the 'CloudFormation Stack Status Change' event pattern. This allows you to trigger a notification action (e.g., via SNS or Lambda) in real time when the stack enters that state.
What should I do if I get this SOA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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