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Digital Electronics

Digital Electronics
The output of a gate is HIGH if and only if all its inputs are LOW. It is true for

 NOR
 X-OR
 NAND
 X-NOR

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Digital Electronics
In Boolean algebra, the bar sign (-) indicates ___________.

None of these
OR operation
AND operation
NOT operation

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Digital Electronics
X + X.Y = ?

 1
 X
 0
 Y

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Digital Electronics
The voltage levels for positive logic system

 must necessarily be 0 V and 5 V
 may be positive or negative
 must necessarily be negative
 must necessarily be positive

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Digital Electronics
Which of these sets of logic gates are designated as universal gates?

 XOR, NOR, NAND.
 OR, NOT, AND.
 NOR, NAND.
 NOR, NAND, XNOR.

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Digital Electronics
Temperature variation is a/an

 Analog quantity
 Either Digital or Analog quantity
 Digital quantity
 None

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