What is a binary coding system?
A typical answer is as follows: It represents data using only two digits: 0 and 1. Each digit in binary code is called a bit. These bits combine to form larger units of data, allowing computers to process information. However, there is no doubt that a CD (Compact Disc) contains data written using a binary coding system. The data on a CD is stored as microscopic pits (depressions) and lands (flat areas) on the reflective layer. Hence, we cannot recognize only two digits: 0 and 1 on the CD surface.
Again, what is a binary coding system?