Question

A principle regarding most display decoders is that when the correct input is present, the related output will switch ____________

(a) HIGH

(b) To high impedance

(c) To an open

(d) LOW

I had been asked this question in an international level competition.

My question is from Asynchronous Counter in section Counters of Digital Circuits

Answer 1

Right answer is (d) LOW

To elaborate: A principle regarding most display decoders is that when the correct input is present, the related output will switch LOW. Since it’s an active-low device.