What is meant by the term 'payload' in RESTful web services?

• A. Method used for transferring data
• B. Data transported between the client and server
• C. HTTP status message
• D. Data format used in responses

Answer: (B)

In the context of RESTful web services, the term 'payload' specifically refers to the data that is transported between the client and server. This data is often included in the body of an HTTP request or response and can be in various formats, such as JSON, XML, or plain text. The payload is essential because it contains the actual information or data that the client wants to send to the server or that the server is providing back to the client as a response.

Understanding the role of the payload is crucial when interacting with APIs, as it directly impacts how data is processed and utilized in web applications. The proper handling of payloads ensures that the data is accurately transmitted and understood, which is key for effective communication between clients and servers in RESTful architectures.