Question

If the number of n selected input lines is equal to 2^m then it requires _____ select lines.

(a) 2

(b) m

(c) n

(d) 2^n

This question was addressed to me in final exam.

I'd like to ask this question from Multiplexers (Data Selectors) topic in division Combinational Circuits of Digital Circuits

Answer 1

The correct choice is (b) m

The explanation: If the number of n selected input lines is equal to 2^m then it requires m select lines to select one of m select lines.