This DVA-C02 practice question tests your understanding of deployment. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 wants separate dev and prod CloudFormation deployments from the same template. Which two practices help?
Use parameters or mappings for environment-specific values
Correct for the stated requirement.
Hardcode production ARNs throughout the template
Why wrong: This does not meet the stated requirement as directly as the correct option.
Use separate stacks or stack names per environment
Correct for the stated requirement.
Use the root account for deployments
Why wrong: This does not meet the stated requirement as directly as the correct option.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use parameters or mappings for environment-specific values
Option A is correct because CloudFormation parameters and mappings allow you to inject environment-specific values (e.g., instance types, AMI IDs, security group IDs) into a single template without modifying the template itself. Parameters prompt for input at stack creation, while mappings provide a static lookup table keyed by environment (e.g., using the `AWS::Region` pseudo-parameter or a user-defined key). This keeps the template reusable and avoids hardcoding values that differ between dev and prod.
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.
Use parameters or mappings for environment-specific values
Why this is correct
Correct for the stated requirement.
Related concept
Read the scenario before looking for a memorised answer.
Hardcode production ARNs throughout the template
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
Use separate stacks or stack names per environment
Why this is correct
Correct for the stated requirement.
Related concept
Read the scenario before looking for a memorised answer.
Use the root account for deployments
Why it's wrong here
This does not meet the stated requirement as directly as the correct option.
Common exam traps
The trap here is that candidates might think hardcoding ARNs is acceptable for production stability, but the exam tests the principle of parameterizing environment-specific values to maintain a single, reusable template across multiple environments.
Detailed technical explanation
Under the hood, CloudFormation parameters are resolved at stack creation time and can be referenced using `Ref` or `Fn::Sub`, while mappings are resolved at runtime using `Fn::FindInMap`. A common real-world scenario is using a `Stage` parameter (e.g., 'dev' or 'prod') as a key in a mapping to select different `InstanceType` values, avoiding hardcoded values and enabling the same template to deploy a `t2.micro` in dev and a `m5.large` in prod. Additionally, separate stacks per environment (Option C) are essential because CloudFormation stacks are isolated resources; using the same stack name for dev and prod would cause conflicts and require manual teardown between deployments.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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FAQ
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
The correct answer is: Use parameters or mappings for environment-specific values — Option A is correct because CloudFormation parameters and mappings allow you to inject environment-specific values (e.g., instance types, AMI IDs, security group IDs) into a single template without modifying the template itself. Parameters prompt for input at stack creation, while mappings provide a static lookup table keyed by environment (e.g., using the `AWS::Region` pseudo-parameter or a user-defined key). This keeps the template reusable and avoids hardcoding values that differ between dev and prod.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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.
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