Which Terraform construct is used to compose configurations and reuse code across deployments?

Which Terraform construct is used to compose configurations and reuse code across deployments?

• A. Variables
• B. Modules
• C. Outputs
• D. Resources

Answer: (B)

Composing configurations and reusing code across deployments is achieved with modules. A module in Terraform is a self-contained package that can include resources, variables, and outputs. You parameterize it with input variables, invoke it from other configurations, and obtain outputs to use elsewhere. Modules can come from local directories or remote sources, making it easy to reuse the same infrastructure patterns across environments and teams. Variables parameterize configurations but don’t bundle and reuse a full set of resources. Outputs expose values but don’t provide a reusable block of infrastructure. Resources are the concrete components you create, but they don’t by themselves enable reuse across multiple deployments. Modules are the mechanism that enables composition and reuse.

Composing configurations and reusing code across deployments is achieved with modules. A module in Terraform is a self-contained package that can include resources, variables, and outputs. You parameterize it with input variables, invoke it from other configurations, and obtain outputs to use elsewhere. Modules can come from local directories or remote sources, making it easy to reuse the same infrastructure patterns across environments and teams.

Variables parameterize configurations but don’t bundle and reuse a full set of resources. Outputs expose values but don’t provide a reusable block of infrastructure. Resources are the concrete components you create, but they don’t by themselves enable reuse across multiple deployments. Modules are the mechanism that enables composition and reuse.