Which headers are commonly used in RESTAPI requests?

• A. Authorization and User-Agent
• B. Accept and Content-Type
• C. Accept and User-Agent
• D. Content-Length and Cache-Control

Answer: (B)

The correct answer is focused on the headers commonly used to specify the nature of the data being sent or requested between the client and server in a REST API interaction. "Accept" and "Content-Type" are two fundamental headers in HTTP requests.

The "Accept" header informs the server about the media types that the client can process, essentially expressing the format in which the client prefers to receive the data (e.g., JSON, XML). This assists the server in returning a response that meets the client's expectations.

The "Content-Type" header, on the other hand, communicates the media type of the resource being sent in the body of the request. For instance, when a client sends JSON data to the server, it will set the "Content-Type" to "application/json". This ensures that the server can correctly interpret the request body.

Together, these headers greatly enhance the interaction by establishing clear expectations for both parties involved regarding data formats, leading to more efficient communication between the client and the server in RESTful services.