Which statement best describes how Terraform interprets a value assigned to a variable declared as an object type?

• A. It is treated as a simple string
• B. It is flattened to a map of strings
• C. All fields are optional by default
• D. It must conform to the declared attribute types and structure

Answer: (D)

Terraform interprets an object-typed variable as a structured value with named attributes. When you declare type = object({ attr1 = type1, attr2 = type2, ... }), any value you assign must have those exact keys and each value must match its declared type. This means it’s not just a string or a generic map; it’s a specific shape that Terraform enforces. If you omit a required attribute or provide a value with the wrong type, Terraform will fail the plan. If you declare attributes as optional, those can be omitted, but by default the structure and types are strictly enforced, ensuring the value conforms to the declared attribute types and structure.