Salesforce Integration Architect Practice Test

The correct choice identifies that the REST API in Salesforce uses either JSON or XML to expose standard and custom objects. REST (Representational State Transfer) is designed to use HTTP requests to access and manipulate data, and it is particularly suited for web services where lightweight communication is important.

JSON (JavaScript Object Notation) is a popular format due to its simplicity and ease of use with JavaScript and modern web applications. It allows for a more compact data exchange, reducing the payload size. On the other hand, XML (eXtensible Markup Language) provides a more structured and verbose format, which can be beneficial in scenarios where data needs to be highly structured.

The option related to WSDL documents refers to SOAP-based services, which are distinct from REST. SOAP (Simple Object Access Protocol) relies on WSDL (Web Services Description Language) to describe the services offered, which is not applicable to the REST API.

While XML is one of the formats used by the REST API, suggesting that it uses only XML would overlook the fact that JSON is also a valid and widely used format. Hence, the combination of JSON or XML provides the flexibility that applications built on RESTful architecture often require.