Question

The output Q4 of this 1-to-8 demultiplexer is ____________

(a) Q2.(Q1)’.Q0.I

(b) Q2.Q1.(Q0)’.I

(c) Q2.(Q1)’.(Q0)’.I

(d) Q2.(Q1).Q0.I

This question was posed to me in an internship interview.

The question is from Demultiplexers (Data Distributors) in division Combinational Circuits of Digital Circuits

Answer 1

Correct choice is (c) Q2.(Q1)’.(Q0)’.I

For explanation I would say: The output Y4 = Q2.(Q1)’.(Q0)’.I. since the bit combinations of 4 are 100.