(I) Why computers uses the string of two bits (0,1) to represent information ?

Because computer is a digital electronic device. Digital electronics use the binary system (1/0  or ON/OFF) thus it will be easier for computer to understand and analyse (0 or  1/ true or false .Computers have processors which is made of collections of transistors which works like a switch. The transistor was designed to operate in one of two models ON or OFF. These logic devices are assembled to provide proce