Quick Answer
The answer is the `create_before_destroy` lifecycle attribute. This setting instructs Terraform to provision the new AWS EC2 instance first, fully attach it to the network, and only then destroy the old instance, ensuring zero downtime during the update. On the HashiCorp Terraform Associate TF-003 exam, this concept tests your understanding of the `lifecycle` meta-argument and its role in managing resource updates that require replacement. A common trap is confusing `create_before_destroy` with `prevent_destroy`, which blocks all destruction, or `ignore_changes`, which only skips attribute diffs. The key distinction is that `create_before_destroy` is a sub-attribute of the `lifecycle` block, not a standalone argument. For memory, think "new first, then old" — like swapping a tire on a moving car: you put the spare on before removing the flat.
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 Terraform plan shows that an AWS EC2 instance will be destroyed and recreated. The team wants to ensure zero downtime during the update. Which lifecycle attribute should be added?
depends_on
Why wrong: Specifies explicit dependencies, but does not control destruction order.
ignore_changes
Why wrong: Ignores attribute changes, but does not affect order of operations.
create_before_destroy
Creates new resource before destroying old, ensuring zero downtime.
prevent_destroy
Why wrong: Prevents destruction entirely, not suitable for updates.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
create_before_destroy
Correct B: create_before_destroy creates the new resource before destroying the old one. A prevents destruction, C ignores attribute changes, D handles explicit dependencies.
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.
depends_on
Why it's wrong here
Specifies explicit dependencies, but does not control destruction order.
ignore_changes
Why it's wrong here
Ignores attribute changes, but does not affect order of operations.
create_before_destroy
Why this is correct
Creates new resource before destroying old, ensuring zero downtime.
Related concept
Read the scenario before looking for a memorised answer.
prevent_destroy
Why it's wrong here
Prevents destruction entirely, not suitable for updates.
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
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: create_before_destroy — Correct B: create_before_destroy creates the new resource before destroying the old one. A prevents destruction, C ignores attribute changes, D handles explicit dependencies.
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.
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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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