What is the primary purpose of the required_providers block in a Terraform configuration?

• A. To declare the source addresses of providers
• B. To set the required provider version constraints
• C. To initialize providers
• D. To define provider configurations

Answer: (B)

The required_providers block tells Terraform which providers your configuration depends on and which versions are acceptable. Its main purpose is to pin provider versions so Terraform knows what to install and to prevent incompatible updates during initialization. While it can indicate the provider’s source, the essential role is enforcing version constraints to keep the configuration stable across runs. Terraform initialization handles actually downloading and installing the providers, and provider configurations are defined in separate provider blocks, not in required_providers.