What is encoding and how ASCII differ from Unicode?

As with all things computers, it all boils down to numbers and every letter, character, or emoji we type has a unique binary number associated with it, so that computers can process them.

Encoding is the process of converting data from one form to another. Main purpose of encoding is to represent and transfer data(character encoding) so that source and destination systems can properly understand data, and encoding can also be used to compress data (video or image encoding).