The correct source argument is `source = "git::https://github.com/org/infra-modules.git//modules/rds"`. This works because Terraform uses a double-slash `//` as a subdirectory delimiter in generic Git module sources, allowing you to pinpoint a specific folder within a repository while the path before the `//` points to the repo root. On the HashiCorp Terraform Associate TF-003 exam, this concept tests your understanding of module source syntax and is a frequent trap: candidates often confuse the single slash (which references the repo root) with the double slash, or misplace the subdirectory path. A common memory tip is to think of the `//` as a "double divider" that separates the repository URL from the internal path—like a fork in the road that leads deeper into the repo. Remember, the subdirectory always comes after the `//`, never before, and the Git protocol prefix (`git::`) is required for HTTPS Git sources.
TF-003 Interact with Terraform modules Practice Question
This TF-003 practice question tests your understanding of interact with terraform modules. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
An organization stores their Terraform modules in a private Git repository. They need to reference a module that resides in a subdirectory called 'modules/rds' within the repository 'infra-modules' on the main branch. Which source argument should be used?
The generic Git source format with a double-slash (//) to specify a subdirectory is correct. Option A is wrong because it uses a single slash and would reference the root of the repository. Option C is wrong because the subdirectory path should come after // not before. Option D is wrong because it uses an incorrect format with a colon before the //.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
Subdirectory path is incorrect; the actual path is 'modules/rds'.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related TF-003 NAT questions on configuration and troubleshooting.
Interact with Terraform modules — This question tests Interact with Terraform modules — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: source = "git::https://github.com/org/infra-modules.git//modules/rds" — The generic Git source format with a double-slash (//) to specify a subdirectory is correct. Option A is wrong because it uses a single slash and would reference the root of the repository. Option C is wrong because the subdirectory path should come after // not before. Option D is wrong because it uses an incorrect format with a colon before the //.
What should I do if I get this TF-003 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related TF-003 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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