Quick Answer
The answer is to use `count` and reference `count.index` for the name tag. This approach is correct because `count` tells Terraform to create multiple identical resources from a single block, and `count.index` provides a zero-based integer for each instance, which you can interpolate into the name tag to guarantee uniqueness—for example, by appending `-${count.index}` to a base name. On the HashiCorp Terraform Associate TF-003 exam, this question tests your understanding of the meta-argument `count` versus `for_each`; a common trap is confusing `for_each` (which requires a map or set of strings) with `count` when you simply need sequential indexing. The exam expects you to recognize that `count.index` is the idiomatic way to generate unique names for multiple similar resources. Memory tip: think of `count` as a numbered list—each item gets its own index, making it perfect for creating distinct tags without extra logic.
This TF-003 practice question tests your understanding of read, generate and modify configuration. 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 DevOps engineer needs to generate multiple similar AWS EC2 instances from a single resource block. They want each instance to have a unique name tag based on an index. Which approach should they use?
Use a `locals` block to define multiple resources
Why wrong: locals cannot generate resources
Use `for_each` and reference `each.key` for the name tag
Why wrong: `for_each` works with a map/set, not index
Use a `terraform_data` resource to loop
Why wrong: terraform_data is not for resource replication
Use `count` and reference `count.index` for the name tag
count creates indexed resources
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use `count` and reference `count.index` for the name tag
Option B is correct because `count` creates multiple instances and `count.index` can be used to derive unique names. Option A is wrong because `for_each` expects a map or set, not an index. Option C and D are wrong because they are not mechanisms for generating multiple resources.
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.
Use a `locals` block to define multiple resources
Why it's wrong here
locals cannot generate resources
Use `for_each` and reference `each.key` for the name tag
Why it's wrong here
`for_each` works with a map/set, not index
Use a `terraform_data` resource to loop
Why it's wrong here
terraform_data is not for resource replication
Use `count` and reference `count.index` for the name tag
Why this is correct
count creates indexed resources
Related concept
Read the scenario before looking for a memorised answer.
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.
Read, generate and modify configuration — study guide chapter
Learn the concepts, then practise the questions
Read, generate and modify configuration practice questions
Targeted practice on this topic area only
All TF-003 questions
519 questions across all exam domains
HashiCorp Terraform Associate TF-003 study guide
Full concept coverage aligned to exam objectives
TF-003 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise TF-003 questions linked to Understand IaC concepts.
Practise TF-003 questions linked to Understand Terraform basics.
Practise TF-003 questions linked to Understand Terraform's purpose.
Practise TF-003 questions linked to Use Terraform outside the core workflow.
Practise TF-003 questions linked to Interact with Terraform modules.
Practise TF-003 questions linked to Use the core Terraform workflow.
Practise TF-003 questions linked to Implement and maintain state.
Practise TF-003 questions linked to Read, generate and modify configuration.
Practise TF-003 questions linked to TF-003 fundamentals.
Practise TF-003 questions linked to TF-003 scenario.
Practise TF-003 questions linked to TF-003 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Read, generate and modify configuration — This question tests Read, generate and modify configuration — Read the scenario before looking for a memorised answer..
The correct answer is: Use `count` and reference `count.index` for the name tag — Option B is correct because `count` creates multiple instances and `count.index` can be used to derive unique names. Option A is wrong because `for_each` expects a map or set, not an index. Option C and D are wrong because they are not mechanisms for generating multiple resources.
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
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 →
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.
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.