What is a REST API endpoint?

• A. A part of the server where databases are stored
• B. A URI used for sending requests
• C. The location of API documentation
• D. A method of handling API responses

Answer: (B)

A REST API endpoint refers to a specific URL (Uniform Resource Identifier) at which client applications can access resources or perform operations on those resources. It is an integral part of the RESTful architecture, allowing developers to interact with the web service using standard HTTP methods like GET, POST, PUT, and DELETE. Each endpoint typically corresponds to a particular resource or a set of actions that can be performed on that resource.

In this context, a URI serves as a communication channel between the client and server. When a request is sent to a specific endpoint, it instructs the server to perform a certain function—be it retrieving data, updating a record, or deleting an item. The clarity of having a direct URI for each resource is essential for the correct functioning of RESTful services, streamlining how clients engage with the server and ensuring that API interactions are straightforward and predictable.

The other options describe concepts related to APIs or server interactions but do not accurately capture the role of an endpoint. Databases are not directly involved with the endpoint concept; API documentation serves as a guide for using the API rather than being an endpoint itself; and handling API responses pertains to the process following an API request rather than defining what an endpoint is.