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Digital Electronics

Digital Electronics
NOT gates are to be added to the inputs of which gate to convert it to a NOR gate?

 NAND
 AND
 OR
 X-NOR

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Digital Electronics
The output of a NOR gate is high

 only when all the inputs are high
 only when at least one input is low
 only when all the inputs are low
 only when at least one input is high

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Digital Electronics
The Quine– McClusky method of minimization of a logic expression is a (i) graphical method (ii) algebraic method (iii) tabular method (iv) a computer-oriented algorithm The correct answers are

 (ii) and (iv)
 (iii) and (iv)
 (i) and (iii)
 (i) and (ii)

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Digital Electronics
For 4 bit parallel addition, we need ________ half adder(s) and ________ full adder(s)

 0 and 3
 1 and 3
 1 and 4
 0 and 4

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Digital Electronics
A multiplexer is a

 1-to-1 device
 N-to-N device
 N-to-1 device
 1-to-N device

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Digital Electronics
X OR X' will result

 1
 X'
 0
 X

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