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Code Converters and Multiplexers - Technical MCQs

Q1:

A BCD decoder will have how many rows in its truth table?

A 10

B 9

C 8

D 3

ANS:A - 10

BCD Inputs ranging from 0 to 9. So we will have TEN 4-bit input combinations. Hence 10 rows are required to represent the inputs and corresponding outputs.