For the logic circuit shown in the figure, X and Y are the two inputs and the final terminal is the output. Which basic logic operation does the complete circuit perform?

Question

G1 Physics · Accepted Answer

Following the Boolean reduction of the gates shown in the figure, the intermediate combination produces Z = X+Y. The final stage inverts this result. Therefore the output is C = NOT(X+Y). This is exactly the Boolean expression of a NOR gate. Hence the complete circuit behaves as a NOR gate. Correct option: D.