Quick Answer
The answer is to use an UpdatePolicy with AutoScalingRollingUpdate. This policy is correct because it allows CloudFormation to perform a rolling update across instances, enabling an EC2 instance type change without replacement by temporarily detaching the instance from an Auto Scaling group, updating it in place, and then reattaching it, thereby avoiding full resource recreation. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this concept tests your understanding of how CloudFormation’s update policies interact with Auto Scaling groups to achieve zero-downtime modifications, a common scenario for production workloads. A frequent trap is confusing this with a Replacement policy, which forces resource recreation, or a CreationPolicy, which only handles initialization signals. Remember the memory tip: “Rolling updates roll with the changes, replacements replace the whole thing.”
This DOP-C02 practice question tests your understanding of configuration management and iac. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 manage its infrastructure. The Operations team needs to update a stack that contains an EC2 instance. They want to change the instance type from t2.micro to t2.small without recreating the instance. Which CloudFormation stack update policy should they use?
Use a ChangeSet with Replacement set to False
Why wrong: ChangeSet does not control replacement behavior for updates.
Use a CreationPolicy with a Timeout
Why wrong: CreationPolicy is not relevant for updates.
Use a DeletionPolicy with Retain
Why wrong: DeletionPolicy only applies on stack deletion.
Use an UpdatePolicy with AutoScalingRollingUpdate
This policy allows rolling updates to instances without recreation.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use an UpdatePolicy with AutoScalingRollingUpdate
Option D is correct because the 'UpdatePolicy: AutoScalingRollingUpdate' attribute can be used to update instance types without interruption when associated with an Auto Scaling group or EC2 instances with a creation policy. Option A is wrong because Replacement policy dictates whether to replace or update a resource. Option B is wrong because CreationPolicy is used to wait for signals before considering the resource created. Option C is wrong because DeletionPolicy only defines what happens when a resource is deleted.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Use a ChangeSet with Replacement set to False
Why it's wrong here
ChangeSet does not control replacement behavior for updates.
Use a CreationPolicy with a Timeout
Why it's wrong here
CreationPolicy is not relevant for updates.
Use a DeletionPolicy with Retain
Why it's wrong here
DeletionPolicy only applies on stack deletion.
Use an UpdatePolicy with AutoScalingRollingUpdate
Why this is correct
This policy allows rolling updates to instances without recreation.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
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
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
The correct answer is: Use an UpdatePolicy with AutoScalingRollingUpdate — Option D is correct because the 'UpdatePolicy: AutoScalingRollingUpdate' attribute can be used to update instance types without interruption when associated with an Auto Scaling group or EC2 instances with a creation policy. Option A is wrong because Replacement policy dictates whether to replace or update a resource. Option B is wrong because CreationPolicy is used to wait for signals before considering the resource created. Option C is wrong because DeletionPolicy only defines what happens when a resource is deleted.
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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
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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