JSON Web Token or JWT is an authorization technique. It is for creating secure web applications.
A module is a reusable piece of code that we can use in our application. We will learn two kinds of module system.
HTTP defines set of methods, each of them indicates specific action for a resource.
Finding a complexity for a program is always an important task. It gives us clear indication of how much slower or faster our program will get when you give more data input at it.