The output of an $OR$ gate is $1$:

  • A
    if either input is $0$
  • B
    only if both inputs are $0$
  • C
    if either or both inputs are $1$
  • D
    only if both inputs are $1$

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The $NOR$ gate is a combination of which two gates?

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The truth table for the given circuit of four $NAND$ gates is:

Two $4-$bit binary numbers, $A = 1101$ and $B = 1010$, are given as inputs to the logic circuit shown in the figure below. The output $(Y)$ will be:

The given truth table is correct for:
$P: 1, 1, 0, 0$
$Q: 1, 0, 1, 0$
$R: 1, 0, 0, 0$

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