Quick Answer
The answer is `terraform plan`. This command is the correct choice because it generates an execution plan that compares your Terraform configuration against the current state of your infrastructure, showing exactly what will be created, modified, or destroyed—without actually applying any changes. In a CI pipeline triggered by pull requests, this allows developers to preview infrastructure changes safely, enabling team review and approval before any resources are altered. On the HashiCorp Terraform Associate TF-003 exam, this scenario tests your understanding of the plan lifecycle phase and the separation of planning from applying; a common trap is confusing `terraform validate` (which only checks syntax) or `terraform apply` (which makes changes) with the preview-only purpose of `plan`. Remember the mnemonic: "Plan before you apply, preview before you buy."
This TF-003 practice question tests your understanding of use terraform outside the core workflow. 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 developer wants to use Terraform in a CI pipeline where the pipeline runs on pull requests. They need to preview infrastructure changes without applying them. Which command should be used?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
terraform plan
Plan shows what will be created/changed/destroyed.
terraform validate
Why wrong: Validate checks configuration, not resources.
terraform init
Why wrong: Init sets up the working directory.
terraform apply
Why wrong: Apply provisions infrastructure.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
terraform plan
Option A is correct because `terraform plan` creates an execution plan that shows what actions Terraform will take to change infrastructure to match the configuration, without actually applying any changes. This is the standard command for previewing infrastructure changes in a CI pipeline triggered by pull requests, enabling developers to review proposed modifications before merging.
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.
terraform plan
Why this is correct
Plan shows what will be created/changed/destroyed.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
terraform validate
Why it's wrong here
Validate checks configuration, not resources.
terraform init
Why it's wrong here
Init sets up the working directory.
terraform apply
Why it's wrong here
Apply provisions infrastructure.
Common exam traps
HashiCorp often tests the distinction between validation and planning, so the trap here is that candidates confuse `terraform validate` (syntax check) with `terraform plan` (infrastructure preview), assuming validation alone is sufficient to preview changes.
Detailed technical explanation
Under the hood, `terraform plan` reads the current state file (either local or remote), compares it with the configuration, and computes a diff of resources to create, update, or destroy. The plan can be saved as a binary file using `-out=plan.tfplan` and later applied exactly as planned, ensuring consistency in CI/CD workflows. In real-world scenarios, teams often use `terraform plan` in pull request pipelines to generate a human-readable summary that is posted as a comment on the PR, enabling collaborative review before any state mutation occurs.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Use Terraform outside the core workflow — study guide chapter
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Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
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FAQ
Use Terraform outside the core workflow — This question tests Use Terraform outside the core workflow — Read the scenario before looking for a memorised answer..
The correct answer is: terraform plan — Option A is correct because `terraform plan` creates an execution plan that shows what actions Terraform will take to change infrastructure to match the configuration, without actually applying any changes. This is the standard command for previewing infrastructure changes in a CI pipeline triggered by pull requests, enabling developers to review proposed modifications before merging.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Read the scenario before looking for a memorised answer.
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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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