You have declared an input variable called environment in your parent module. What must you do to pass the value to a child module in the configuration?

You have declared an input variable called environment in your parent module. What must you do to pass the value to a child module in the configuration?

• A. Add node_count = var.node_count
• B. Declare the variable in a terraform.tfvars file
• C. Declare a node_count input variable for child module
• D. Nothing, child modules inherit variables of parent module

Answer: (C)

To pass a value from a parent module to a child module, the child must expose an input variable that can receive the value, and the parent must provide that value in the module block. In practice, you declare an input variable in the child module to receive the environment value (for example, variable "environment" { type = string }). Then in the parent module, you wire it up with environment = var.environment inside the module block. This explicit passing is required because child modules don’t automatically inherit variables from the parent. Declaring the variable in a tfvars file doesn’t automatically propagate it to the child, and modules don’t inherit variables from the parent by default. The essential action is creating a matching input variable in the child and supplying it in the module call.

To pass a value from a parent module to a child module, the child must expose an input variable that can receive the value, and the parent must provide that value in the module block.

In practice, you declare an input variable in the child module to receive the environment value (for example, variable "environment" { type = string }). Then in the parent module, you wire it up with environment = var.environment inside the module block. This explicit passing is required because child modules don’t automatically inherit variables from the parent.

Declaring the variable in a tfvars file doesn’t automatically propagate it to the child, and modules don’t inherit variables from the parent by default. The essential action is creating a matching input variable in the child and supplying it in the module call.