- A
Set the stack policy to allow all updates and retry the update.
Why wrong: Stack policy is not the issue; the update failed due to resource creation failure.
- B
Use the 'SignalResource' action to send a success signal to the failed resource if it is a custom resource.
Why wrong: SignalResource is for custom resources waiting for signals; it's not for general rollback recovery.
- C
Manually delete the failed nested stack from the AWS CloudFormation console.
Why wrong: Deleting nested stacks can cause orphaned resources; better to use continue rollback.
- D
Use the 'ContinueUpdateRollback' operation from the AWS CLI or console.
This operation can skip the failed resource and continue the rollback.
- E
If the rollback fails due to a resource that cannot be deleted, manually fix the resource (e.g., delete a non-empty S3 bucket) and then continue rollback.
Sometimes resources must be manually cleaned up before rollback can proceed.
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. 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 with nested stacks to manage a microservices application. The root stack creates a VPC, and nested stacks create ECS services. A developer updates the root stack, but the update fails with 'UPDATE_ROLLBACK_IN_PROGRESS'. The rollback also fails. Which THREE steps should the team take to recover the stack? (Choose THREE.)
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' operation from the AWS CLI or console.
Options A, C, and D are correct: continue rollback on failure, reset failed status, and delete nested stacks. Option B is not valid. Option E is not relevant.
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.
- ✗
Set the stack policy to allow all updates and retry the update.
Why it's wrong here
Stack policy is not the issue; the update failed due to resource creation failure.
- ✗
Use the 'SignalResource' action to send a success signal to the failed resource if it is a custom resource.
Why it's wrong here
SignalResource is for custom resources waiting for signals; it's not for general rollback recovery.
- ✗
Manually delete the failed nested stack from the AWS CloudFormation console.
Why it's wrong here
Deleting nested stacks can cause orphaned resources; better to use continue rollback.
- ✓
Use the 'ContinueUpdateRollback' operation from the AWS CLI or console.
Why this is correct
This operation can skip the failed resource and continue the rollback.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
If the rollback fails due to a resource that cannot be deleted, manually fix the resource (e.g., delete a non-empty S3 bucket) and then continue rollback.
Why this is correct
Sometimes resources must be manually cleaned up before rollback can proceed.
Related concept
Read the scenario before looking for a memorised answer.
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 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 DOP-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.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use the 'ContinueUpdateRollback' operation from the AWS CLI or console. — Options A, C, and D are correct: continue rollback on failure, reset failed status, and delete nested stacks. Option B is not valid. Option E is not relevant.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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