Nodejs is shinning with its non-blocking, event-driven I/O to remain lightweight and efficient in the face of data-intensive real-time applications that run across distributed devices with its blazing fast speed.
scenario when async needed:
While building webApp we may need to make multiple API calls in order to get data from various components or modules. lets take a scenario of visiting a friend’s wall in a social networking site.
In order to rendering to a friend’s wall we need at least following data.