Q.Expand ASCII.

An alphanumeric code represents not only the decimal digits but also the letters of the alphabet, punctuation and control symbols as groups of bits, so that text can be stored, processed and transmitted by digital systems. The two standard alphanumeric codes are ASCII and EBCDIC.

ASCII stands for the American Standard Code for Information Interchange. It is a 7-bit code, so it can represent $2^7 = 128$ different characters, including the digits 0–9, the uppercase and lowercase letters, punctuation marks and non-printing control characters. It is the code used by keyboards, personal computers and most communication equipment. Each character has a fixed 7-bit pattern; for example the ten decimal digits 0 to 9 have consecutive ASCII values starting at 0110000. …