Question

A truth table with output columns numbered 0–15 may be for which type of decoder IC?

(a) Hexadecimal 1-of-16

(b) Dual octal outputs

(c) Binary-to-hexadecimal

(d) Hexadecimal-to-binary

I got this question during an interview for a job.

The doubt is from Parity Generators/Checkers topic in section Combinational Circuits of Digital Circuits

Answer 1

Right answer is (a) Hexadecimal 1-of-16

Easy explanation: A binary decoder is a combinational logic circuit that decodes binary information from n-inputs to a maximum of 2^n outputs. A truth table with output columns numbered 0–15 may be for Hexadecimal 1-of-16. Because hexadecimal occupies less space in a system.