Quick Answer
The answer is Sentinel policies, the policy-as-code framework built into Terraform Cloud and Terraform Enterprise. Sentinel allows organizations to define fine-grained, logic-based rules—such as enforcing that all EC2 instances must be of type t2.micro or t2.small—by writing policies in a dedicated language that are evaluated before any infrastructure is provisioned. On the HashiCorp Terraform Associate TF-003 exam, this question tests your understanding of Terraform Cloud’s governance features, often appearing as a distractor where candidates confuse Sentinel with cost estimation (Option A) or security scanning (Option B). A common trap is assuming a third-party tool handles policy enforcement, but Sentinel is the native solution for resource constraints. Remember the mnemonic: “Sentinel Stands Sentinel over your resources”—it’s the only feature that actively blocks non-compliant runs based on custom rules.
This TF-003 practice question tests your understanding of use terraform outside the core workflow. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 Terraform Cloud and wants to enforce policies that all EC2 instances must be of type t2.micro or t2.small. Which feature should they use?
Run tasks
Why wrong: Run tasks integrate external tools but are not policy enforcement built-in.
Cost estimation
Why wrong: Cost estimation provides cost forecasts, not policy enforcement.
Sentinel policies
Sentinel is the policy-as-code framework for enforcing rules.
Terraform validate
Why wrong: Validate checks syntax, not policy.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Sentinel policies
Option D is correct because Sentinel is the policy-as-code framework in Terraform Cloud/Enterprise. Option A is for cost tracking. Option B is for security analysis. Option C is not a Terraform Cloud feature.
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.
Run tasks
Why it's wrong here
Run tasks integrate external tools but are not policy enforcement built-in.
Cost estimation
Why it's wrong here
Cost estimation provides cost forecasts, not policy enforcement.
Sentinel policies
Why this is correct
Sentinel is the policy-as-code framework for enforcing rules.
Related concept
Read the scenario before looking for a memorised answer.
Terraform validate
Why it's wrong here
Validate checks syntax, not policy.
Common exam traps
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
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.
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 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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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: Sentinel policies — Option D is correct because Sentinel is the policy-as-code framework in Terraform Cloud/Enterprise. Option A is for cost tracking. Option B is for security analysis. Option C is not a Terraform Cloud feature.
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.
Read the scenario before looking for a memorised answer.
About these practice questions
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Same concept, more angles
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. A company uses Terraform Cloud and wants to ensure that only approved modules from the private registry are used in configurations. How can they enforce this?
hardWhy C: Sentinel policies can inspect module declarations and block runs if modules come from unapproved sources. VCS restrictions are not always effective. Run tasks and workspace variables do not directly control module sources.
Variation 2. A team is using Terraform Cloud and wants to enforce that all AWS resources created by Terraform have a specific tag. Which feature should they use?
mediumWhy B: Sentinel policies allow you to define rules that check configurations before they are applied. Workspace variables store values, cost estimation estimates costs, run tasks integrate third-party tools – none of them enforce tagging rules.
Variation 3. Refer to the exhibit. A Terraform Cloud plan includes an EC2 instance of type 't2.medium'. The team uses Sentinel policies. Which action should they take to proceed?
mediumWhy C: Option B is correct because the policy must be satisfied by using an allowed instance type. Options A, C, and D are not appropriate: A would change policy which may be against organization rules; C implies override but policy is enforced; D disables checks entirely.
Variation 4. A team uses Terraform Cloud for remote state management. They want to ensure that state file changes are only made through the Terraform Cloud API and not through direct access to the storage backend. Which feature should they enable?
mediumWhy A: Option A is correct because Sentinel policy enforcement allows the team to define rules that restrict direct modifications to the state file in the storage backend, ensuring that all state changes must go through the Terraform Cloud API. This prevents bypassing Terraform Cloud's access controls and audit logging, which is essential for maintaining integrity and compliance in remote state management.
Last reviewed: Jun 24, 2026
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