The answer is to use an `aws_secretsmanager_secret_version` data source and mark the variable as sensitive. This approach is most secure because it reads the secret directly from AWS Secrets Manager during the plan or apply phase, keeping the value out of your configuration files and state unless explicitly handled, while the `sensitive` attribute prevents the value from being displayed in CLI output or logs. On the HashiCorp Terraform Associate TF-003 exam, this question tests your understanding of the principle that secrets should never be hardcoded or stored in plaintext—common traps include thinking environment variables are safe (they can leak in shell history or debug logs) or that marking a default in `locals` is sufficient (it still exposes the value if output). Remember the mnemonic: “Data source, sensitive source”—always fetch secrets dynamically and mark them as sensitive to keep them out of sight.
TF-003 Read, generate and modify configuration Practice Question
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 team stores sensitive secrets in AWS Secrets Manager and wants to reference them in Terraform without exposing the values. Which approach is most secure and recommended?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use an aws_secretsmanager_secret_version data source and mark the variable as sensitive.
Option A is correct: using data sources to read secrets at plan/apply time and passing them via variables marked sensitive. Option B is wrong because hardcoding in variables.tf is insecure. Option C is wrong because using defaults in locals still exposes the value if output. Option D is wrong because environment variables can leak in logs or shell history.
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.
✗
Set the secret as an environment variable and reference it in the configuration.
Why it's wrong here
Environment variables can be exposed in shell history or logs.
✗
Store the secret in a variables.tf file with a default value.
Why it's wrong here
Hardcoding secrets in code is insecure and not recommended.
✓
Use an aws_secretsmanager_secret_version data source and mark the variable as sensitive.
Why this is correct
Data sources retrieve secrets securely at runtime, and sensitive variables prevent display.
Related concept
Read the scenario before looking for a memorised answer.
✗
Define the secret in a locals block with a default.
Why it's wrong here
locals are not designed to keep secrets; they are visible in plan output.
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.
Trap categories for this question
Command / output trap
locals are not designed to keep secrets; they are visible in plan output.
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.
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: Use an aws_secretsmanager_secret_version data source and mark the variable as sensitive. — Option A is correct: using data sources to read secrets at plan/apply time and passing them via variables marked sensitive. Option B is wrong because hardcoding in variables.tf is insecure. Option C is wrong because using defaults in locals still exposes the value if output. Option D is wrong because environment variables can leak in logs or shell history.
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.
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Question Discussion
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