If a, b, c, d are inputs to a gate and x is its output, then as per the following time graph, the gate is

NOT

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AND

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NAND

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Solution

The correct option is C OR
From the waveforms, output is 0 only when all four inputs are 0. When, any one of the inputs is 1, then the output is 1. This is valid only for OR gate.

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The output of an AND gate is connected to both the inputs of a NOR gate, then this circuit will act as a

^{'} 1^{'}

y

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