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Analog to Digital - Technical MCQs

Q1:

Which type of signal is represented by discrete values?

A noisy signal

B nonlinear

C analog

D digital

ANS:D - digital

Discrete signal usually refers to Discrete in time, unless stated otherwise. So, Discrete signal (in time) has values at only fixed intervals of times (say at n=0,1,2,3...). Digital signal takes fixed values of amplitude A (say A=2,4,6,8....).