5b Describe Variable Scope Within Modules TERRAFORM-ASSOCIATE-004 Practice Questions (Page 4)

Questions 16–20

1. 16application · easy

   A module for a database declares `variable "db_name" {}` and uses it in a resource. The root configuration has a variable also named `db_name` set to `customers`. The module block passes `db_name = "orders"`. What value does the module use for `db_name`?

   • Acustomers
   • Borders
   • CAn empty string
   • DAn error because the names conflict
   Reveal Solution Discussion Select an answer first
2. 17application · easy

   A team has a module that creates an AWS S3 bucket. The bucket's ARN is computed inside the module as `aws_s3_bucket.this.arn`. The root configuration needs to reference this ARN to attach a bucket policy. What must be added to the module configuration to make the ARN available to the root configuration?

   • Aresource "aws_s3_bucket_policy" "this" { bucket = aws_s3_bucket.this.id }
   • Bvariable "bucket_arn" { type = string }
   • Clocals { bucket_arn = aws_s3_bucket.this.arn }
   • Doutput "bucket_arn" { value = aws_s3_bucket.this.arn }
   Reveal Solution Discussion Select an answer first
4. 18application · medium

   A platform team maintains a module that provisions an Azure Kubernetes Service cluster. The module declares an input variable named `cluster_name` with no default. Another team calls this module from their root configuration, which also defines a local value named `cluster_name`. The calling configuration's module block does not pass a value for `cluster_name`. What happens when the root configuration is applied?

   • ATerraform uses the root configuration's local value `cluster_name` as the module input.
   • BTerraform errors because the required input variable `cluster_name` has no value.
   • CTerraform uses an empty string for `cluster_name` inside the module.
   • DTerraform prompts interactively for the value of `cluster_name` during apply.
   Reveal Solution Discussion Select an answer first
5. 19expert · medium

   A module declares `variable "subnet_ids" { type = list(string) }`. The root configuration has a local `subnet_ids = ["subnet-1", "subnet-2"]`. The module block passes `subnet_ids = local.subnet_ids`. Inside the module, the variable is used to create resources. Later, the root local is changed to `["subnet-3"]`. What happens on the next plan?

   • ATerraform errors because the local changed.
   • BThe module uses both old and new subnet IDs.
   • CThe module uses the new list `["subnet-3"]`.
   • DThe module continues to use the old subnet IDs from state.
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   A module creates an Azure resource group. Which block must be added to the module to allow the root module to see the resource group's name?

   • Avariable "resource_group_name" { type = string }
   • Boutput "resource_group_name" { value = azurerm_resource_group.rg.name }
   • Cresource "azurerm_resource_group" "rg" { name = "my-rg" }
   • Dlocals { resource_group_name = azurerm_resource_group.rg.name }
   Reveal Solution Discussion Select an answer first