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

a-bcd-decoder-will-have-how-many-rows-in-its-truth-table-a

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

A. 10

B. 9

C. 8

D. 3

The question was asked in an interview.

Question is taken from Parity Generators/Checkers in portion Combinational Circuits of Digital Circuits

Right option is A. 10

Explanation: A binary decoder is a combinational logic circuit which decodes binary information from n-inputs to a maximum of 2^n outputs. Thus, BCD decoder will have 10 rows as it’s input ranges from 0 to 9.