Quick Answer
The answer is the Parameters section with the AllowedValues property. This is correct because AllowedValues explicitly defines a whitelist of acceptable inputs for a CloudFormation parameter, such as EC2 instance types like t3.micro or m5.large, and any value outside this list will be rejected during stack creation or update. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this concept tests your understanding of how to enforce governance and prevent misconfiguration at the template level, often appearing in questions that contrast Parameters with Mappings—a common trap where candidates confuse mapping key-value lookups with input restriction. Remember that Mappings are for looking up pre-defined data based on a key (like region to AMI ID), not for limiting user choices. A simple memory tip: AllowedValues acts as a bouncer at the door, only letting in the instance types on the guest list, while Mappings is just a reference chart inside the party.
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 deploy a multi-tier application. The template includes a parameter for the instance type of EC2 instances. The DevOps team wants to restrict the allowed values to a specific set of instance types. Which CloudFormation section should be used?
Outputs
Why wrong: Outputs return stack values.
Parameters with AllowedValues
AllowedValues restricts parameter input to a list.
Conditions
Why wrong: Conditions control resource creation based on conditions.
Mappings
Why wrong: Mappings are used for lookup tables.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Parameters with AllowedValues
Option C is correct because the AllowedValues property in the Parameters section restricts input values. Option A (Mappings) maps keys to values, not input restriction. Option B (Conditions) determine resource creation. Option D (Outputs) return values after stack creation.
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.
Outputs
Why it's wrong here
Outputs return stack values.
Parameters with AllowedValues
Why this is correct
AllowedValues restricts parameter input to a list.
Related concept
Read the scenario before looking for a memorised answer.
Conditions
Why it's wrong here
Conditions control resource creation based on conditions.
Mappings
Why it's wrong here
Mappings are used for lookup tables.
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.
Trap categories for this question
Command / output trap
Outputs return stack values.
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 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
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: Parameters with AllowedValues — Option C is correct because the AllowedValues property in the Parameters section restricts input values. Option A (Mappings) maps keys to values, not input restriction. Option B (Conditions) determine resource creation. Option D (Outputs) return values after stack creation.
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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