Ans. DIGITAL SIGNAL
A signal that can have only two discrete \/alues is called a digital signal. f
For example, a voltage with square waveform is a digital srgnal.This signal has only two values i.e. +5V and 0V. The high voltage is+5V and the low voltage is
0V. It can be seen that digital signal provides the data by a maximum and a minimum
voltage level. The changes occurring in the digital signal are not continuous.