- A
Change sets
Change sets allow you to preview how changes will affect your resources, including whether an update will cause replacement or in-place modification, giving you control to avoid unnecessary recreation.
- B
Stack policy
Why wrong: Stack policies are used to prevent specific resources from being updated or deleted during a stack update; they do not help in previewing or avoiding recreation.
- C
Update with drift detection
Why wrong: Drift detection is used to identify differences between the actual resource configuration and the expected CloudFormation template, not for previewing updates.
- D
Directly edit the stack template and use the update stack action
Why wrong: While this is a valid way to update a stack, it does not provide a preview of the changes; you would need to use change sets to see the impact before applying.
SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. 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 deploy a three-tier web application. The SysOps administrator wants to update a critical parameter, such as the instance type, and ensure that the change is applied without recreating the EC2 instance, if possible. Which CloudFormation stack update feature should be used to achieve this?
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
Change sets
Change sets allow you to preview the changes that will be made to your stack resources before executing them. For an update that modifies an instance type, CloudFormation will attempt to perform an update without replacement if the resource supports it (e.g., AWS::EC2::Instance supports in-place updates for the InstanceType property). By using a change set, you can confirm that the update will not recreate the EC2 instance before applying it.
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.
- ✓
Change sets
Why this is correct
Change sets allow you to preview how changes will affect your resources, including whether an update will cause replacement or in-place modification, giving you control to avoid unnecessary recreation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Stack policy
Why it's wrong here
Stack policies are used to prevent specific resources from being updated or deleted during a stack update; they do not help in previewing or avoiding recreation.
- ✗
Update with drift detection
Why it's wrong here
Drift detection is used to identify differences between the actual resource configuration and the expected CloudFormation template, not for previewing updates.
- ✗
Directly edit the stack template and use the update stack action
Why it's wrong here
While this is a valid way to update a stack, it does not provide a preview of the changes; you would need to use change sets to see the impact before applying.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse change sets with simply updating the stack directly, not realizing that change sets provide a critical preview to avoid unintended resource replacement, especially for properties that may or may not require replacement depending on the resource type.
Detailed technical explanation
How to think about this question
Under the hood, CloudFormation evaluates each resource's update behavior based on its 'Replacement' attribute in the resource specification. For AWS::EC2::Instance, the InstanceType property has an 'Update requires: No interruption' behavior, meaning the instance can be stopped and started with the new type without full recreation. Change sets generate a JSON diff of the stack template and the current state, allowing you to see the 'Replacement' status for each resource before committing the update, which is critical for production deployments where downtime must be minimized.
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 SOA-C02 question test?
Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Change sets — Change sets allow you to preview the changes that will be made to your stack resources before executing them. For an update that modifies an instance type, CloudFormation will attempt to perform an update without replacement if the resource supports it (e.g., AWS::EC2::Instance supports in-place updates for the InstanceType property). By using a change set, you can confirm that the update will not recreate the EC2 instance before applying it.
What should I do if I get this SOA-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
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Last reviewed: Jun 11, 2026
This SOA-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 SOA-C02 exam.
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