- A
Use the 'ContinueUpdateRollback' API or AWS Management Console to resume rollback, and fix any underlying issues.
This is the designed recovery action.
- B
Ignore the error and use the stack as-is.
Why wrong: The stack is not in a consistent state.
- C
Attempt to continue the update again.
Why wrong: The stack is in a failed state.
- D
Delete the stack and recreate it.
Why wrong: May lose resources and is not the best practice.
Question 984 of 1,750
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. 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 team uses AWS CloudFormation to manage a multi-tier application. They update the stack and receive this error: 'UPDATE_ROLLBACK_FAILED'. The stack is in a state where some resources were updated, then rollback failed. What is the best course of action?
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
✓
Use the 'ContinueUpdateRollback' API or AWS Management Console to resume rollback, and fix any underlying issues.
The 'UPDATE_ROLLBACK_FAILED' state indicates that CloudFormation attempted to roll back a failed stack update but encountered an error during the rollback process. The correct action is to use the 'ContinueUpdateRollback' API (or the AWS Management Console equivalent) to resume the rollback after fixing the underlying issue that caused the rollback to fail, such as a resource dependency or permission problem. This allows CloudFormation to complete the rollback and return the stack to a known stable state, rather than leaving it in an inconsistent or partially updated condition.
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 the 'ContinueUpdateRollback' API or AWS Management Console to resume rollback, and fix any underlying issues.
Why this is correct
This is the designed recovery action.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Ignore the error and use the stack as-is.
Why it's wrong here
The stack is not in a consistent state.
- ✗
Attempt to continue the update again.
Why it's wrong here
The stack is in a failed state.
- ✗
Delete the stack and recreate it.
Why it's wrong here
May lose resources and is not the best practice.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think they can simply retry the update (Option C) or ignore the error (Option B), not realizing that CloudFormation's state machine requires a specific recovery action—'ContinueUpdateRollback'—to exit the 'UPDATE_ROLLBACK_FAILED' state before any further stack operations are allowed.
Detailed technical explanation
How to think about this question
Under the hood, CloudFormation's 'ContinueUpdateRollback' API re-initiates the rollback process from the point of failure, allowing you to skip specific resources that caused the rollback to fail (via the 'ResourcesToSkip' parameter) or to retry the rollback after fixing the issue (e.g., updating a resource's properties or permissions). This is particularly useful in scenarios where a resource, such as an Auto Scaling group or a Lambda function, has a dependency that prevents deletion or modification during rollback. A real-world example is when a stack update fails due to a change in an IAM role's policy, and the rollback fails because the old policy is still referenced by another resource; using 'ContinueUpdateRollback' with 'ResourcesToSkip' allows you to bypass that resource and complete the rollback.
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 DOP-C02 question test?
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use the 'ContinueUpdateRollback' API or AWS Management Console to resume rollback, and fix any underlying issues. — The 'UPDATE_ROLLBACK_FAILED' state indicates that CloudFormation attempted to roll back a failed stack update but encountered an error during the rollback process. The correct action is to use the 'ContinueUpdateRollback' API (or the AWS Management Console equivalent) to resume the rollback after fixing the underlying issue that caused the rollback to fail, such as a resource dependency or permission problem. This allows CloudFormation to complete the rollback and return the stack to a known stable state, rather than leaving it in an inconsistent or partially updated condition.
What should I do if I get this DOP-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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Last reviewed: Jul 4, 2026
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