Question

If two inputs are active on a priority encoder, which will be coded on the output?

(a) The higher value

(b) The lower value

(c) Neither of the inputs

(d) Both of the inputs

I had been asked this question during an online exam.

The origin of the question is Encoders topic in chapter Combinational Circuits of Digital Circuits

Answer 1

Right answer is (a) The higher value

To explain: An encoder is a combinational circuit encoding the information of 2^n input lines to n output lines, thus producing the binary equivalent of the input. If two inputs are active on a priority encoder, the input of higher value will be coded in the output.