Question

How many types of parity bits are found?

(a) 2

(b) 3

(c) 4

(d) 1

I got this question in an interview for job.

The origin of the question is Parity Generators/Checkers topic in portion Combinational Circuits of Digital Circuits

Answer 1

The correct option is (a) 2

Easiest explanation: There are two types of parity bits, namely even parity and odd parity. In even parity, a 1 bit is added in order to make a group of data bits have even number of 1s. While, in odd parity, a 1 bit is added in order to make a group of data bits have odd number of 1s.