What are the supported types for parameters and return values in Apex REST classes?

In Apex REST classes, the supported types for parameters and return values are indeed quite broad, enabling flexibility when creating and consuming RESTful services within the Salesforce platform. The correct answer encompasses all valid types that can be used.

Apex primitives—such as String, Integer, Boolean, Double, and Date—are foundational data types that can be passed as parameters or returned in a response. This means you can have simple data types for quick interactions without complex structures.

Additionally, sObjects, which represent Salesforce database records, can also be utilized, allowing developers to send or receive entire records through REST calls. This is particularly useful when you need to manipulate or exchange data that is closely tied to Salesforce's objects and fields.

Lists and maps expand the capability further by allowing collections of data. A list can be an ordered collection of items (primitives or sObjects), while a map allows for key-value pairs, providing a structured way to send data. This is essential for situations where multiple related values need to be conveyed together, making your API more versatile and data-rich.

By affirming that all of these types are supported, the option acknowledges the robust functionality available to developers working with Apex REST services, facilitating varied data handling in