Explain What is REST?

REST, expanded as Representational State Transfer, is an architectural style developed by Roy Fielding in 2000. REST presents a set of constraints to be used in the creation of web services. The services that use REST constraints are called as RESTful Web Services. For an interface to be referred to as RESTful, it should satisfy the six-guiding constraints. These constraints are names as the client-server, stateless, cacheable, uniform interface, layered system, and code on demand.

After satisfying the constraints, the RESTful web services can be used to provide an interface between the computer system and the internet. Using this interface, a system can access and manipulate the resources present on the web by using a predefined set of operations.