SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. 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 web application. The stack creation fails with the error 'Resource creation cancelled' for an EC2 instance. The instance type is t3.micro, and the AMI ID is specified in the template. Which of the following is the most likely cause of the failure?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The account has reached the vCPU limit for On-Demand Instances in the region.
The error 'Resource creation cancelled' indicates that the instance launch was aborted, likely due to reaching the vCPU limit (On-Demand Instance limit per region). The t3.micro instance consumes vCPUs; if the account has a standard limit of 5 vCPUs, launching a t3.micro (2 vCPUs) might exceed the limit if other instances are running. Option A is correct because CloudFormation does not automatically request a limit increase. Option B is wrong because the AMI ID is specified, so no default AMI is used. Option C is wrong because t3.micro is supported. Option D is wrong because the instance type is valid.
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.
✗
The instance type 't3.micro' is not available in the region.
Why it's wrong here
t3.micro is available in all regions.
✗
The instance type is invalid for the specified AMI.
Why it's wrong here
t3.micro is a valid instance type for most AMIs.
✗
The AMI ID is not specified for the region.
Why it's wrong here
The AMI ID is provided in the template; if it were missing, a different error would occur.
✓
The account has reached the vCPU limit for On-Demand Instances in the region.
Why this is correct
CloudFormation cancels resource creation if the account exceeds its vCPU limit. The limit must be increased via a support request.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
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 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 SOA-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.
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: The account has reached the vCPU limit for On-Demand Instances in the region. — The error 'Resource creation cancelled' indicates that the instance launch was aborted, likely due to reaching the vCPU limit (On-Demand Instance limit per region). The t3.micro instance consumes vCPUs; if the account has a standard limit of 5 vCPUs, launching a t3.micro (2 vCPUs) might exceed the limit if other instances are running. Option A is correct because CloudFormation does not automatically request a limit increase. Option B is wrong because the AMI ID is specified, so no default AMI is used. Option C is wrong because t3.micro is supported. Option D is wrong because the instance type is valid.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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