First slide

Logic gates

Question

The combination of gates shown below yields _____

Moderate

A

OR gate
B

NOT gate
C

XOR gate
D

NAND gate

Solution

$\begin{array}{l} Y = \bar{(\bar{A . A}) . (\bar{B . B)}} = \bar{\bar{A .} \bar{B}} = \bar{\bar{A}} + \bar{\bar{B}} = A + B \\ Hence the combination gives OR gate. \end{array}$

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