TF-003 Use the core Terraform workflow Practice Question
This TF-003 practice question tests your understanding of use the core terraform 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 team is running terraform in a CI/CD pipeline that executes multiple jobs in parallel for different modules. They notice that terraform init takes a long time in each job because it downloads provider plugins repeatedly. They want to speed up the init process by caching providers. What should they do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use the plugin_cache_dir setting in the CLI configuration file.
Option A is correct because the `plugin_cache_dir` setting in the Terraform CLI configuration file instructs Terraform to store downloaded provider plugins in a shared cache directory. Once a plugin is cached, subsequent `terraform init` commands in parallel jobs can reuse the cached plugin instead of downloading it again, significantly reducing init time. This setting is defined in the `.terraformrc` or `terraform.rc` file and is the recommended approach for CI/CD pipelines.
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.
✓
Use the plugin_cache_dir setting in the CLI configuration file.
Why this is correct
This caches downloaded plugins across runs, speeding up init.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set the environment variable TF_PLUGIN_CACHE_DIR to a shared path.
Why it's wrong here
This works, but the CLI configuration is more reliable and persistent.
✗
Copy the .terraform folder from a previous job.
Why it's wrong here
This is brittle and can lead to incompatible provider versions.
✗
Use terraform providers lock to freeze versions.
Why it's wrong here
This locks provider versions but does not cache the downloads.
Common exam traps
Common exam trap: answer the scenario, not the keyword
HashiCorp often tests the distinction between CLI configuration file settings and environment variables, so the trap here is that candidates confuse the deprecated `TF_PLUGIN_CACHE_DIR` environment variable with the correct `plugin_cache_dir` CLI configuration setting, or they assume environment variables override the config file when they do not.
Detailed technical explanation
How to think about this question
The `plugin_cache_dir` setting works by creating a local filesystem cache (e.g., `~/.terraform.d/plugin-cache`) where Terraform stores downloaded provider plugins as `.zip` files. When `terraform init` runs, it checks the cache first; if the required provider version is present, it copies or symlinks the plugin into the project's `.terraform/providers` directory, avoiding redundant downloads. In CI/CD pipelines with parallel jobs, this cache can be shared via a persistent volume (e.g., in Kubernetes or Jenkins), but care must be taken to ensure the cache is not corrupted by concurrent writes—Terraform uses file locking to handle this safely.
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.
TExam Day Tips
→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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Use the core Terraform workflow — This question tests Use the core Terraform workflow — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use the plugin_cache_dir setting in the CLI configuration file. — Option A is correct because the `plugin_cache_dir` setting in the Terraform CLI configuration file instructs Terraform to store downloaded provider plugins in a shared cache directory. Once a plugin is cached, subsequent `terraform init` commands in parallel jobs can reuse the cached plugin instead of downloading it again, significantly reducing init time. This setting is defined in the `.terraformrc` or `terraform.rc` file and is the recommended approach for CI/CD pipelines.
What should I do if I get this TF-003 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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