Which logic gate is represented by the following combination of logic gates?
Which logic gate is represented by the following combination of logic gates?

- $\mathrm{OR}$
- NAND
- AND
- NOR.
Solution
Truth table
$\begin{array}{rrrrr}
A & B & A^{\prime} & B^{\prime} & Y \\
0 & 0 & 1 & 1 & 0 \\
0 & 1 & 1 & 0 & 0 \\
1 & 0 & 0 & 1 & 0 \\
1 & 1 & 0 & 0 & 1
\end{array}$
Output of this is same as that of AND gate.
Asked in: NEET 2006
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