What is REST API? What HTTP request methods exist? What is HTTP?

REST API (Representational State Transfer) is an architectural style for creating web services that uses standard HTTP methods to interact with resources. In REST API, resources are represented as URLs, and operations on them are performed using HTTP requests.

Main HTTP methods:

• GET — retrieve a resource
• POST — create a new resource
• PUT — update an existing resource
• DELETE — delete a resource
• PATCH — partially update a resource

HTTP (HyperText Transfer Protocol) is an application layer protocol for transferring hypertext (web pages) and other data between a client and a server. It defines the format of requests and responses, as well as interaction methods (GET, POST, etc.).

Thus, REST API is built on top of HTTP, using its methods to manage resources in web applications.