- A
A module should define variables for any values that need to be customized by the calling configuration.
This is a best practice for reusability.
- B
A module should assume the calling configuration will provide all necessary provider configurations.
Why wrong: Modules should declare required providers and optionally configure them.
- C
A module must have all Terraform code in a single main.tf file.
Why wrong: Modules can have multiple .tf files; structure is flexible.
- D
A module can be sourced from the same repository as the root module using a relative path.
Local module references are valid and common.
- E
A module should rely on direct attribute references to resources in the calling configuration.
Why wrong: Modules should use outputs to expose values, not direct references.
TF-003 Interact with Terraform modules Practice Question
This TF-003 practice question tests your understanding of interact with terraform modules. 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.
Which TWO statements about Terraform module structure and best practices are correct? (Choose two.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
A module should define variables for any values that need to be customized by the calling configuration.
Option A is correct because Terraform modules are designed to be reusable and configurable. By defining input variables for any customizable values (e.g., resource names, sizes, regions), the module abstracts away hardcoded details and allows the calling configuration to pass in specific values via variable assignments. This follows the principle of encapsulation, where the module's internal logic remains unchanged while its behavior adapts to the caller's needs.
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.
- ✓
A module should define variables for any values that need to be customized by the calling configuration.
Why this is correct
This is a best practice for reusability.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A module should assume the calling configuration will provide all necessary provider configurations.
Why it's wrong here
Modules should declare required providers and optionally configure them.
- ✗
A module must have all Terraform code in a single main.tf file.
Why it's wrong here
Modules can have multiple .tf files; structure is flexible.
- ✓
A module can be sourced from the same repository as the root module using a relative path.
Why this is correct
Local module references are valid and common.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A module should rely on direct attribute references to resources in the calling configuration.
Why it's wrong here
Modules should use outputs to expose values, not direct references.
Common exam traps
Common exam trap: answer the scenario, not the keyword
HashiCorp often tests the misconception that modules must be stored in separate repositories or that they cannot reference resources from the calling configuration, but the real trap is that candidates confuse 'direct attribute references' (which are forbidden) with 'outputs' (which are the correct way to expose values), leading them to select option E as correct.
Trap categories for this question
Command / output trap
Modules should use outputs to expose values, not direct references.
Detailed technical explanation
How to think about this question
When a module uses a relative path source (e.g., `source = "./modules/networking"`), Terraform resolves the path relative to the root module's directory, allowing modular code to be stored in the same repository without external dependencies. Under the hood, Terraform copies the module's directory into its `.terraform` cache and processes it as a separate configuration tree, ensuring that variables and outputs are the only interfaces between the root and child modules. This design enforces strict data boundaries, preventing accidental cross-module resource references that could lead to dependency graph errors or state corruption.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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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Interact with Terraform modules — study guide chapter
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FAQ
Questions learners often ask
What does this TF-003 question test?
Interact with Terraform modules — This question tests Interact with Terraform modules — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A module should define variables for any values that need to be customized by the calling configuration. — Option A is correct because Terraform modules are designed to be reusable and configurable. By defining input variables for any customizable values (e.g., resource names, sizes, regions), the module abstracts away hardcoded details and allows the calling configuration to pass in specific values via variable assignments. This follows the principle of encapsulation, where the module's internal logic remains unchanged while its behavior adapts to the caller's needs.
What should I do if I get this TF-003 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 30, 2026
This TF-003 practice question is part of Courseiva's free HashiCorp 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 TF-003 exam.
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