Semiconductors

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189 of 209

Question 189 of 209

Which of the following gives a reversible operation?

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Answer: (D)

A logic gate gives the reversible operation if we can recover input data from the output.
For example, a NOT gate gives the reversible operation because we always know that the input is the reverse of the output.
For the given logic gate, let the input is XX.
So, the output, Y=X+Xˉ=XˉY=\bar{X+X}=\bar{X} (NOT gate)

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