Module sources (local, registry, git) in Terraform - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Identify the correct module source type

Which module source declaration correctly uses a local path in Terraform?

A source = "git::https://github.com/org/repo.git//modules/network"

B source = "registry.terraform.io/modules/network"

C source = "./modules/network"

D source = "terraform-aws-modules/vpc/aws"

💡 Hint

Local module sources use relative or absolute file paths.

Local module sources are specified by file paths starting with ./ or /, unlike registry or git sources.

❓ Configuration

intermediate

Correct Git module source syntax

Which option correctly declares a Terraform module source from a Git repository with a subdirectory path?

A source = "git::https://github.com/org/repo.git//modules/app"

B source = "[e-mail]:org/repo.git//modules/app"

C source = "https://github.com/org/repo.git//modules/app"

D source = "git::https://github.com/org/repo.git/modules/app"

💡 Hint

Git sources require the 'git::' prefix and double slashes before subdirectory.

Terraform Git module sources must start with 'git::' and use double slashes to specify subdirectory inside the repo.

❓ Architecture

advanced

Choosing module source for reusable infrastructure

You want to share a Terraform module across multiple projects and teams with version control and easy updates. Which module source type is best?

A HTTP URL to a zip archive

B Local path on each developer's machine

C Terraform Registry public module

D Git repository with version tags

💡 Hint

Consider version control and team collaboration.

Git repositories with version tags allow controlled sharing, updates, and collaboration across teams.

❓ security

advanced

Security risk in module source declaration

Which module source declaration poses a security risk by allowing untrusted code execution?

A source = "git::https://github.com/trusted/repo.git"

B source = "git::https://github.com/untrusted/repo.git"

C source = "terraform-aws-modules/vpc/aws"

D source = "./modules/network"

💡 Hint

Consider trustworthiness of the source repository.

Using a module from an untrusted Git repository risks running malicious code during Terraform runs.

❓ service_behavior

expert

Terraform behavior with missing module source

What happens when Terraform init runs with a module source pointing to a non-existent Git repository URL?

A Terraform init fails with an error about unreachable source

B Terraform init downloads an empty module directory

C Terraform init completes successfully but skips the module

D Terraform init ignores the module and continues

💡 Hint

Terraform requires module sources to be accessible during init.

Terraform init fails if it cannot access the module source, preventing incomplete or broken infrastructure setups.