Three keywords in Node.js constitute as Globals. These are:
- Global – it represents the Global namespace object and acts as a container for all other <global> objects.
- Process – It is one of the global objects but can turn asynchronous function into an async callback. It can be accessed from anywhere in the code, and it primarily gives back information about the application or the environment.
- Buffer – it is a class in Node.js to handle binary data.