The answer is to change the instance type or specify a different Availability Zone in the template. This resolves the error because AWS CloudFormation enforces that the requested EC2 instance type must be supported in the specific Availability Zone you have selected; if it is not, the service returns a CREATE_FAILED status with the message that the configuration is not supported. On the AWS Certified Developer Associate DVA-C02 exam, this scenario tests your understanding of how instance type availability varies by zone and that CloudFormation does not automatically re-route to a different AZ. A common trap is to assume the error is due to permissions or a faulty AMI, but the key clue is the phrase “not supported” rather than “unauthorized” or “invalid.” Remember the memory tip: “Type or Zone, not alone” — when an instance type fails, you must adjust either the type or the zone, not the template’s permissions or image.
DVA-C02 Troubleshooting and Optimization Practice Question
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. 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 developer is using AWS CloudFormation to deploy a stack. The stack creation fails with a 'CREATE_FAILED' status for an EC2 instance resource. The event message says 'The requested configuration is currently not supported. Please check the documentation for supported configurations.' What should the developer do to resolve this issue?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change the instance type or specify a different Availability Zone in the template.
The error indicates the instance type is not available in the specified Availability Zone. Option A is correct: changing the instance type or AZ resolves it. Option B is wrong because the error is not about permissions. Option C is wrong because the stack creation failed; updating the stack is not possible. Option D is wrong because the error is not about the AMI.
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.
✗
Update the stack with a new parameter value.
Why it's wrong here
You cannot update a failed stack; you must delete and recreate.
✗
Add an IAM role to the EC2 instance.
Why it's wrong here
The error is about configuration, not permissions.
✓
Change the instance type or specify a different Availability Zone in the template.
Why this is correct
The instance type is not supported in the selected AZ.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use a different Amazon Machine Image (AMI).
Why it's wrong here
The error is about instance type, not AMI.
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 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.
Identify which DVA-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.
Troubleshooting and Optimization — This question tests Troubleshooting and Optimization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Change the instance type or specify a different Availability Zone in the template. — The error indicates the instance type is not available in the specified Availability Zone. Option A is correct: changing the instance type or AZ resolves it. Option B is wrong because the error is not about permissions. Option C is wrong because the stack creation failed; updating the stack is not possible. Option D is wrong because the error is not about the AMI.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-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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This DVA-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 DVA-C02 exam.
Question Discussion
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