The answer is to rerun the stack update with the --disable-rollback flag and then describe the stack events. This approach is correct because, by default, CloudFormation automatically rolls back a failed update, deleting or reverting the resources that caused the error and making it impossible to inspect the failure state. Using --disable-rollback forces the stack to remain in a partially updated, failed state, preserving the problematic resource and its error messages so you can use describe-stack-events to investigate the specific error. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this question tests your understanding of CloudFormation’s failure behavior and the operational need to preserve state for debugging—a common trap is assuming you can investigate a rolled-back or deleted stack. A useful memory tip is “disable to diagnose”: when you need to investigate a CloudFormation stack update failure without rollback, remember to disable the automatic rollback to keep the evidence intact.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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. A stack update fails with a resource update failure. The team wants to investigate the specific error without rolling back the stack. What is the BEST approach?
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 the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Rerun the stack update with the --disable-rollback flag and then describe the stack events.
Option C is correct because disabling rollback on failure allows the stack to remain in a failed state for investigation. Option A is wrong because you cannot describe stack events of a deleted stack. Option D is wrong because creating a change set does not help with the current failure. Option B is wrong because you can check the specific resource status reason.
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.
✓
Rerun the stack update with the --disable-rollback flag and then describe the stack events.
Why this is correct
Disabling rollback preserves the stack for investigation.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Delete the stack and review the CloudFormation logs.
Why it's wrong here
Deleting the stack removes evidence of the failure.
✗
Create a change set to preview the updates.
Why it's wrong here
Change sets are for planning, not troubleshooting existing failures.
✗
Use the AWS CLI describe-stack-resources command to see the status of each resource.
Why it's wrong here
You can see status but not reason without rollback disabled.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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
How to think about this question
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.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 SAP-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.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Rerun the stack update with the --disable-rollback flag and then describe the stack events. — Option C is correct because disabling rollback on failure allows the stack to remain in a failed state for investigation. Option A is wrong because you cannot describe stack events of a deleted stack. Option D is wrong because creating a change set does not help with the current failure. Option B is wrong because you can check the specific resource status reason.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-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.
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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