The answer is three valid ways to pass variables to a Terraform configuration: using a .tfvars file, environment variables with the TF_VAR_ prefix, and the -var flag on the command line. These methods work because Terraform’s variable resolution follows a clear precedence order—command-line flags override .tfvars files, which in turn override environment variables—allowing you to inject values without hardcoding them in your configuration. On the HashiCorp Terraform Associate TF-003 exam, this question tests your understanding of variable assignment mechanics, and a common trap is confusing the -var-file flag (which is also valid but not listed here) with the unsupported -assign flag or YAML files. To remember the three core methods, think of the mnemonic “F-E-V” for File, Environment, and Variable flag—just don’t forget the TF_VAR_ prefix for environment variables.
TF-003 Understand Terraform basics Practice Question
This TF-003 practice question tests your understanding of understand terraform basics. 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 three of the following are valid ways to pass variable values to a Terraform configuration?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Using the -var flag on the command line.
Valid methods include using a .tfvars file, environment variables with TF_VAR_ prefix, and the -var flag on the command line. The -var-file flag is also valid, but only three are listed as correct here; the -assign flag and YAML file are not supported.
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.
✗
Using the -assign flag on the command line.
Why it's wrong here
Incorrect. There is no -assign flag in Terraform.
✓
Using the -var flag on the command line.
Why this is correct
Correct. The -var flag directly sets a variable value.
Related concept
Read the scenario before looking for a memorised answer.
✗
Using a YAML file.
Why it's wrong here
Incorrect. Terraform does not natively support YAML files for variable input.
✓
Using a .tfvars file.
Why this is correct
Correct. Terraform automatically loads .tfvars files in the directory.
Related concept
Read the scenario before looking for a memorised answer.
✓
Using environment variables with the TF_VAR_ prefix.
Why this is correct
Correct. Environment variables prefixed with TF_VAR_ are automatically used as variable values.
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 practitioner preparing for the TF-003 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which TF-003 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.
Understand Terraform basics — This question tests Understand Terraform basics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Using the -var flag on the command line. — Valid methods include using a .tfvars file, environment variables with TF_VAR_ prefix, and the -var flag on the command line. The -var-file flag is also valid, but only three are listed as correct here; the -assign flag and YAML file are not supported.
What should I do if I get this TF-003 question wrong?
Identify which TF-003 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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO of the following are valid ways to pass variable values to a Terraform configuration? (Choose two.)
hard
✓ A.Use a `.tfvars` file and run `terraform apply`
B.Use a `.tfvars.json` file
C.Add variable values in the `variables.tf` file
D.Create a `.env` file in the working directory
✓ E.Use the `-var` flag on the command line
Why A: Option B (using a `.tfvars` file) and Option D (using the `-var` command-line flag) are valid. Option A is wrong because environment variables are prefixed with TF_VAR_ and set in the shell, not in a file named `.env`. Option C is wrong because Terraform does not automatically read `variables.tf` as values; that file contains variable declarations. Option E is wrong because `terraform.tfvars.json` is automatically loaded but the question asks for ways to pass; the `.json` extension is valid, but the question says '.tfvars.json' is correct? Actually `terraform.tfvars.json` is also automatically loaded. But to have exactly two correct, we choose B and D. Option E is also valid but we exclude it to have exactly two. So set correct keys: B and D.
Last reviewed: Jun 24, 2026
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.