Before using a remote backend in Terraform, it is mandatory to runterraform init. This command initializes a Terraform working directory, which includes configuring the backend. If aremote backend is specified, terraform initwill set up the working directory to use it, including copying any existing state to the remote backend if necessary.References= This principle is a fundamental part of working with Terraform and its backends, as outlined in general Terraform documentation and best practices. The specific HashiCorp Terraform Associate (003) study materials in the provided files did not include direct references to this information.

To output returned values from a child module in the Terraform CLI output, you need to declare the output in both the child module and the root module. The child module output will return the value to the root module, and the root module output will display the value in the CLI. References = [Terraform Outputs]

Explanation
To see all the resources that Terraform will delete, you can use either of these two commands:
terraform destroy will show the plan of destruction and ask for your confirmation before proceeding.
You can cancel the command if you do not want to destroy the resources.
terraform plan -destroy will show the plan of destruction without asking for confirmation. You can use this command to review the changes before running terraform destroy. References = : Destroy Infrastructure : Plan Command: Options

Explanation
You must initialize your working directory before running terraform validate, as it will ensure that all the required plugins and modules are installed and configured properly. If you skip this step, you may encounter errors or inconsistencies when validating your configuration files.

Explanation
The terraform import command is not part of any other Terraform workflow. It must be explicitly invoked by the user with the appropriate arguments, such as the resource address and the ID of the existing infrastructure to import. References = [Importing Infrastructure]