Which file type is used to define the resources and configurations for Terraform?

The file type used to define the resources and configurations for Terraform is the .tf file. This file format is specific to Terraform and follows HashiCorp Configuration Language (HCL), which is designed to be both human-readable and machine-friendly. HCL allows users to define infrastructure resources in a clear and structured way, making it easy to understand and manage configurations.

The .tf files contain the main configurations for defining resources such as virtual machines, storage accounts, and networking components. This structured format encourages consistency and best practices when managing infrastructure as code.

Other file types mentioned, while potentially useful for different approaches or tools, do not serve the specific purpose of defining Terraform configurations. For example, .json is a data interchange format and can be used with Terraform as an alternative way to configure resources, but it is not the native or preferred format. Similarly, .yaml is commonly used for configuration files in other applications or tools such as Kubernetes but is not relevant for Terraform. Finally, .txt is a generic text file format that lacks the specific structure and syntax required by Terraform configurations.