Q:

How transistor processes binary?

I know that processors perform the tasks in binary. If I give an instruction to the computer, for instance, I have pressed letter "A", which is denoted as 01000001 in binary. How does a transistor perform that task?, more precisely, does a processor use 8 transistors to process this 8 bit of instructions or does a single transistor change its state 8 times to process this 8 bits of instruction?
(It might be a very basic question, but I am not a computer expert)

A:

It’s rare for a single transistor to perform any binary logic function (except for very local logic inversion).  Usually circuits made from multiple transistors are used to create logic gates, and multiple gates and/or state registers are used to create higher level functions for serial or parallel processing of multi-bit binary operands, and thousands to billions of gates and transistor memory are used to make CPUs or processors.
Also, transistors don’t really work directly with binary digital abstractions, but with varying voltage and/or current levels. However, certain reliably obtainable voltage level ranges, in and out of gate circuits usually built with multiple transistors, are defined as binary logic levels for the purposes of digital design.

