- A
Create a CloudFormation module for the VPC resources and reference it in each stack.
CloudFormation modules enable reuse and centralized management.
- B
Define the VPC resources in a CloudFormation macro and call the macro from each stack.
Why wrong: Macros transform templates, they do not package reusable resources.
- C
Publish the VPC template in AWS Service Catalog and have each account provision from it.
Why wrong: Service Catalog is for provisioning products, not for reuse within CloudFormation stacks.
- D
Use nested stacks by creating a separate template for the VPC and including it in each account's stack.
Why wrong: Nested stacks reuse templates but are not as modular as modules for reuse within a template.
Question 149 of 1,750
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 infrastructure across multiple accounts. They want to reuse a set of resource definitions for a standard VPC configuration. Which approach minimizes duplication and maintains centralized control?
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
✓
Create a CloudFormation module for the VPC resources and reference it in each stack.
CloudFormation modules allow you to encapsulate a set of resource definitions into a reusable component that can be referenced across multiple stacks. This approach minimizes duplication because the module is defined once in a central registry (e.g., the CloudFormation public or private module registry) and each stack simply includes a `Module` declaration. It also maintains centralized control because updates to the module are automatically propagated to all stacks that reference it, without requiring manual template copying or stack updates.
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.
- ✓
Create a CloudFormation module for the VPC resources and reference it in each stack.
Why this is correct
CloudFormation modules enable reuse and centralized management.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Define the VPC resources in a CloudFormation macro and call the macro from each stack.
Why it's wrong here
Macros transform templates, they do not package reusable resources.
- ✗
Publish the VPC template in AWS Service Catalog and have each account provision from it.
Why it's wrong here
Service Catalog is for provisioning products, not for reuse within CloudFormation stacks.
- ✗
Use nested stacks by creating a separate template for the VPC and including it in each account's stack.
Why it's wrong here
Nested stacks reuse templates but are not as modular as modules for reuse within a template.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse CloudFormation macros with modules, thinking macros can encapsulate reusable resources, but macros only transform template code at deploy time and do not provide a reusable resource definition mechanism.
Detailed technical explanation
How to think about this question
CloudFormation modules are essentially self-contained templates that are registered in the CloudFormation registry (private or public) and can include resource definitions, parameters, and conditions. When a module is updated, any stack that references it can be updated to use the new version by specifying a version alias or a specific version string, ensuring consistent deployment across accounts. In a multi-account setup, modules can be shared via AWS Resource Access Manager (RAM) or published to a central registry, enabling centralized governance while allowing individual stacks to override module parameters as needed.
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 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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Configuration Management and IaC — study guide chapter
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a CloudFormation module for the VPC resources and reference it in each stack. — CloudFormation modules allow you to encapsulate a set of resource definitions into a reusable component that can be referenced across multiple stacks. This approach minimizes duplication because the module is defined once in a central registry (e.g., the CloudFormation public or private module registry) and each stack simply includes a `Module` declaration. It also maintains centralized control because updates to the module are automatically propagated to all stacks that reference it, without requiring manual template copying or stack updates.
What should I do if I get this DOP-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.
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Last reviewed: Jul 4, 2026
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