A circuit can be designed to perform manydifferent functions e.g.a circuit has 3 inputs A, B and C and 3 outputs:Output X is logic level 1 (or 'high') if one or moreinputs are at logic level 1 (or 'high').Output Y is 1 if two or more of the inputs are at 1.Output Z is 1 if all three inputs are at logic level 1.