The following figure shows a logic gate circuit with two inputs $A$ and $B$ and the output $Y.$ The voltage waveforms of $A, B$ and the output $Y$ are as given in the diagram. The logic gate is $:-$

  • A
    $\text{NOR}$ gate
  • B
    $\text{OR}$ gate
  • C
    $\text{AND}$ gate
  • D
    $\text{NAND}$ gate

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The input and the output waveforms of a logic gate are shown in the diagram. Identify the logic gate.

The circuit diagram shows a logic combination with the states of outputs $X, Y$ and $Z$ given for inputs $P, Q, R$ and $S$ all at state $1$. When inputs $P$ and $R$ change to state $0$ with inputs $Q$ and $S$ still at $1$,the states of outputs $X, Y$ and $Z$ change to:

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If $ A=1 $ and $ B=0 $,then in terms of Boolean algebra,$ \bar{A}+B= $

The Boolean expression $P + \overline{P}Q$,where $P$ and $Q$ are the inputs of the logic circuit,represents

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