- A
All variables must be assigned a value before running terraform plan.
Why wrong: Variables can have default values, making assignment optional. If a default is present, it is used.
- B
Variable values cannot be overridden using environment variables.
Why wrong: Environment variables with the TF_VAR_ prefix can override variable values.
- C
The terraform.tfvars file is automatically loaded by Terraform.
Terraform automatically loads terraform.tfvars and any .auto.tfvars files in the root module directory.
- D
Default values for variables can only be set using a .tfvars file.
Why wrong: Default values are set within the variable block in .tf files, not in .tfvars files.
- E
Variables can be declared in a .tf file using the 'variable' block.
The 'variable' block is the standard way to declare input variables in Terraform configuration.
Quick Answer
The correct answer is that variables can be declared in a .tf file using the 'variable' block, and Terraform automatically loads a terraform.tfvars file for assignment. This is because the variable block defines the input variable's name, type, and optional default, while Terraform's default variable file, terraform.tfvars, is loaded automatically to supply values without requiring explicit -var-file flags. On the HashiCorp Terraform Associate TF-003 exam, this concept tests your understanding of declaration versus assignment methods, often appearing in questions that try to confuse you with the requirement that variables must be assigned before plan or that defaults are set in .tfvars files. A common trap is assuming environment variables with the TF_VAR_ prefix cannot override .tfvars values, but they can. Remember the memory tip: "Declare with variable, assign with tfvars, override with TF_VAR."
TF-003 Read, generate and modify configuration Practice Question
This TF-003 practice question tests your understanding of read, generate and modify configuration. 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.
Which TWO statements about Terraform's handling of input variables are true?
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
The terraform.tfvars file is automatically loaded by Terraform.
Option A is correct because variables are declared using the 'variable' block in .tf files. Option C is correct because Terraform automatically loads terraform.tfvars. Option B is incorrect because variables can have defaults and are not required to be assigned before plan. Option D is incorrect because environment variables with TF_VAR_ prefix can override variable values. Option E is incorrect because default values are set in the variable block, not in .tfvars files.
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.
- ✗
All variables must be assigned a value before running terraform plan.
Why it's wrong here
Variables can have default values, making assignment optional. If a default is present, it is used.
- ✗
Variable values cannot be overridden using environment variables.
Why it's wrong here
Environment variables with the TF_VAR_ prefix can override variable values.
- ✓
The terraform.tfvars file is automatically loaded by Terraform.
Why this is correct
Terraform automatically loads terraform.tfvars and any .auto.tfvars files in the root module directory.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Default values for variables can only be set using a .tfvars file.
Why it's wrong here
Default values are set within the variable block in .tf files, not in .tfvars files.
- ✓
Variables can be declared in a .tf file using the 'variable' block.
Why this is correct
The 'variable' block is the standard way to declare input variables in Terraform configuration.
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.
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Read, generate and modify configuration — study guide chapter
Learn the concepts, then practise the questions
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Read, generate and modify configuration practice questions
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FAQ
Questions learners often ask
What does this TF-003 question test?
Read, generate and modify configuration — This question tests Read, generate and modify configuration — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The terraform.tfvars file is automatically loaded by Terraform. — Option A is correct because variables are declared using the 'variable' block in .tf files. Option C is correct because Terraform automatically loads terraform.tfvars. Option B is incorrect because variables can have defaults and are not required to be assigned before plan. Option D is incorrect because environment variables with TF_VAR_ prefix can override variable values. Option E is incorrect because default values are set in the variable block, not in .tfvars files.
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 →
Same concept, more angles
1 more ways this is tested on TF-003
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 statements about Terraform configuration files are correct? (Choose two.)
easy- A.All .tf files in subdirectories are automatically loaded.
- ✓ B.A file named terraform.tfvars is automatically processed.
- C.The backend configuration must be defined in the same file as the provider configuration.
- D.The -var-file flag accepts a comma-separated list of variable files.
- ✓ E.Variable definitions files can have .tfvars.json extension.
Why B: Option B and C are correct because Terraform automatically loads terraform.tfvars and also supports .tfvars.json extension. Option A is incorrect because Terraform does not load .tf files recursively by default. Option D is incorrect because the -var-file flag does not accept comma-separated lists; you must use multiple flags. Option E is incorrect because backend configuration does not have to be in the same file as provider configuration.
Last reviewed: Jun 24, 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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