HashiCorp Terraform 004 Modules Guide

HashiCorp Terraform 004 modules guide covering module sources, versioning, reuse, and composition decisions.

Modules are Terraform’s reuse mechanism. HashiCorp is testing whether you can separate packaging reusable configuration from separating state or storing values. If module and workspace concepts blur together, module questions become harder than they need to be.

Work this objective area in order

Lesson	Focus
5.1 Module Sources & Interfaces	Learn where modules come from and how inputs and outputs form the interface.
5.2 Using Modules & Versions	Learn how to reuse modules safely and constrain external module versions.

Fast routing inside this chapter

If the question is really about…	Go first to…
module source, input, output, or variable scope	5.1 Module Sources & Interfaces
reusing modules or pinning their versions	5.2 Using Modules & Versions

What strong answers usually do

define modules as reusable configuration packages
explain that variables and outputs form a module’s interface
keep module reuse separate from workspace-based state separation

In this section

HashiCorp Terraform 004 Module Sources Guide
Study HashiCorp Terraform 004 Module Sources: key concepts, common traps, and exam decision cues.
HashiCorp Terraform 004 Module Versions Guide
Study HashiCorp Terraform 004 Module Versions: key concepts, common traps, and exam decision cues.

Revised on Sunday, May 10, 2026

4. Config

6. State