- A
Set the CreationPolicy attribute on the database resource.
Why wrong: CreationPolicy is for signaling during creation, not updates.
- B
Configure a Stack Policy to protect the database resource.
Why wrong: StackPolicy prevents updates but does not manage replacement behavior.
- C
Set the UpdatePolicy to AutoScalingRollingUpdate.
Why wrong: AutoScalingRollingUpdate is for Auto Scaling groups, not RDS.
- D
Set the UpdatePolicy to AutoScalingReplacingUpdate with WillReplace set to true.
This policy handles replacement of a resource with minimal downtime.
Question 851 of 1,750
DOP-C02 AutoScalingReplacingUpdate Practice Question
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. A key principle to apply: autoScalingReplacingUpdate. 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 includes an RDS database. The update requires changing the DB instance class, which will cause a replacement of the database. The team wants to minimize downtime and ensure that data is not lost. Which CloudFormation stack update policy should they use?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"minimum / minimize"Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
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 UpdatePolicy to AutoScalingReplacingUpdate with WillReplace set to true.
Option D is correct. The UpdatePolicy attribute with AutoScalingReplacingUpdate and WillReplace set to true directs CloudFormation to replace the resource in a way that minimizes downtime. While this policy is commonly associated with Auto Scaling groups, it can be applied to other resources that support replacement, such as RDS DB instances, to ensure a smooth replacement process. Options A and C are irrelevant (CreationPolicy is for signaling, AutoScalingRollingUpdate is for rolling updates on Auto Scaling groups), and option B is a Stack Policy that protects resources from updates but does not control replacement behavior.
Key principle: AutoScalingReplacingUpdate
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 CreationPolicy attribute on the database resource.
Why it's wrong here
CreationPolicy is for signaling during creation, not updates.
- ✗
Configure a Stack Policy to protect the database resource.
Why it's wrong here
StackPolicy prevents updates but does not manage replacement behavior.
- ✗
Set the UpdatePolicy to AutoScalingRollingUpdate.
Why it's wrong here
AutoScalingRollingUpdate is for Auto Scaling groups, not RDS.
- ✓
Set the UpdatePolicy to AutoScalingReplacingUpdate with WillReplace set to true.
Why this is correct
This policy handles replacement of a resource with minimal downtime.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
AutoScalingReplacingUpdate
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates may mistakenly think that AutoScalingReplacingUpdate only applies to Auto Scaling groups. However, in CloudFormation, this policy can be applied to any resource that supports replacement, including RDS DB instances, as long as the resource's update requires replacement.
Detailed technical explanation
How to think about this question
Under the hood, when `AutoScalingReplacingUpdate` with `WillReplace: true` is used, CloudFormation orchestrates the creation of the new RDS instance (with the new instance class) in parallel while the old instance remains active, then updates the stack outputs and dependencies to point to the new resource before deleting the old one. This approach leverages CloudFormation's resource lifecycle hooks to ensure that the replacement is atomic and that any data stored in the old database is not lost if the replacement fails, as the old instance is only removed after the new one is fully operational. In a real-world scenario, this policy is critical for stateful resources like RDS where downtime must be minimized and data durability is paramount, as it avoids the need for manual snapshot-and-restore procedures.
KKey Concepts to Remember
- AutoScalingReplacingUpdate
- WillReplace
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
AutoScalingReplacingUpdate
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Review autoScalingReplacingUpdate, then practise related DOP-C02 questions on the same topic to reinforce the concept.
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Configuration Management and IaC — study guide chapter
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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 — AutoScalingReplacingUpdate.
What is the correct answer to this question?
The correct answer is: Set the UpdatePolicy to AutoScalingReplacingUpdate with WillReplace set to true. — Option D is correct. The UpdatePolicy attribute with AutoScalingReplacingUpdate and WillReplace set to true directs CloudFormation to replace the resource in a way that minimizes downtime. While this policy is commonly associated with Auto Scaling groups, it can be applied to other resources that support replacement, such as RDS DB instances, to ensure a smooth replacement process. Options A and C are irrelevant (CreationPolicy is for signaling, AutoScalingRollingUpdate is for rolling updates on Auto Scaling groups), and option B is a Stack Policy that protects resources from updates but does not control replacement behavior.
What should I do if I get this DOP-C02 question wrong?
Review autoScalingReplacingUpdate, then practise related DOP-C02 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
AutoScalingReplacingUpdate
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Last reviewed: Jun 11, 2026
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