SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company uses AWS CloudFormation to deploy infrastructure. The company wants to ensure that if a stack update fails, the stack automatically rolls back to the last known good state. Which CloudFormation stack option should the company configure?
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
✓
Set the 'Rollback on failure' option to 'Yes' when performing the stack update.
When performing a stack update, you can set the 'Rollback on failure' option to 'Yes'. This ensures that if the update fails, CloudFormation automatically rolls back to the last known good state. Option A is incorrect because termination protection prevents accidental deletion, not rollback. Option B is incorrect because a stack policy controls which resources can be updated, not rollback behavior. Option D is incorrect because change sets allow you to review changes but do not provide automatic rollback.
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 termination protection on the stack.
Why it's wrong here
Termination protection prevents accidental deletion, not rollback on failed updates.
- ✗
Configure a stack policy to prevent updates to critical resources.
Why it's wrong here
Stack policies are for protecting resources during updates, not for rollback behavior.
- ✓
Set the 'Rollback on failure' option to 'Yes' when performing the stack update.
Why this is correct
This is the default behavior; if an update fails, CloudFormation rolls back automatically.
- ✗
Use a change set to review changes before updating the stack.
Why it's wrong here
Change sets provide a preview but do not handle rollback.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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