If you realize, many web applications that we interact with, are by default synchronous. A client connection gets established for every request made by the client and a callable method gets invoked on the server side. The server performs the business operation and writes the response body to the client socket. Once the response is exhausted, the client connection gets closed. All these operations happen in sequence one after the other--hence, synchronous.
But the Web today, as we see it, cannot rely on synchronous modes of operations only. Consider the case of a website that queries data from the Web and retrieves the information for you. (For instance, your website allows for integration with Facebook and every ...
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