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

Which logic gate is represented by the following combination of logic gates?
  1. $\mathrm{OR}$
  2. NAND
  3. AND
  4. 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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