The correct answer includes using change sets to review changes before updating the stack, as this directly prevents misconfigurations that could trigger a failure during updates. This strategy is part of a broader CloudFormation stack recovery approach that also leverages StackSets for multi-region deployment and nested stacks for modular, reusable templates. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your ability to combine preventive controls (change sets) with recovery mechanisms (multi-region failover and stack isolation). A common trap is focusing only on reactive recovery, like backups, while ignoring proactive validation. Remember the mnemonic “C-N-R”: Change sets for review, Nested stacks for isolation, and Regional replication via StackSets for failover.
DOP-C02 Resilient Cloud Solutions Practice Question
This DOP-C02 practice question tests your understanding of resilient cloud 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 is using AWS CloudFormation to deploy a critical application stack. The company wants to ensure that the stack can be recovered quickly in case of a failure. Which THREE strategies should the company implement? (Choose THREE.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use StackSets to deploy the stack across multiple Regions.
Option B is correct because AWS CloudFormation StackSets allow you to deploy stacks across multiple AWS Regions and accounts from a single template, enabling multi-Region disaster recovery. By deploying the critical application stack in multiple Regions, you can quickly fail over to a secondary Region if the primary fails, meeting the requirement for rapid recovery.
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.
✗
Disable rollback on stack creation failure to preserve resources for debugging.
Why it's wrong here
Disabling rollback can leave resources in an inconsistent state; rollback is safer.
✓
Use StackSets to deploy the stack across multiple Regions.
Why this is correct
StackSets enable multi-Region deployment for resilience.
Related concept
Read the scenario before looking for a memorised answer.
✗
Define the entire application in a single CloudFormation template.
Why it's wrong here
A single template is harder to manage and recover; modular approach is better.
✓
Use nested stacks to separate components into reusable templates.
Why this is correct
Nested stacks allow independent recovery of components.
Related concept
Read the scenario before looking for a memorised answer.
✓
Use change sets to review changes before updating the stack.
Why this is correct
Change sets allow validation and reduce the risk of failed updates.
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 often confuse 'recovery' with 'debugging' and select disabling rollback (Option A) thinking it helps preserve resources, but it actually hinders recovery by leaving failed resources in place.
Detailed technical explanation
How to think about this question
CloudFormation StackSets use a self-managed or service-managed permission model to propagate stack instances across target Regions and accounts, with automatic drift detection and stack instance management. In a disaster recovery scenario, you can use StackSets to maintain warm standby stacks in multiple Regions, and combine with Route 53 DNS failover or AWS Global Accelerator for traffic redirection. Nested stacks (Option D) enable you to reference reusable templates as resources, promoting modular design and independent lifecycle management of components like VPCs or databases.
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.
Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use StackSets to deploy the stack across multiple Regions. — Option B is correct because AWS CloudFormation StackSets allow you to deploy stacks across multiple AWS Regions and accounts from a single template, enabling multi-Region disaster recovery. By deploying the critical application stack in multiple Regions, you can quickly fail over to a secondary Region if the primary fails, meeting the requirement for rapid recovery.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company uses AWS CloudFormation to deploy a multi-tier application. During an update, the stack fails and rolls back. The rollback also fails, leaving the stack in UPDATE_ROLLBACK_FAILED state. The operations team needs to resolve this with minimal disruption. What is the MOST efficient approach?
hard
✓ A.Use the 'ContinueUpdateRollback' API or AWS Management Console to retry the rollback.
B.Manually modify the resources to match the previous stack state.
C.Delete the stack and recreate it from the original template.
D.Execute a change set to update the stack to the desired configuration.
Why A: Option A is correct because continuing the rollback can resolve the failure and bring the stack to a consistent state. Option B is wrong because deleting the stack would remove all resources. Option C is wrong because executing a change set on a failed stack is not possible. Option D is wrong because manual modification is error-prone and not recommended.
Last reviewed: Jun 24, 2026
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This DOP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DOP-C02 exam.
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