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Digital Electronics

Digital Electronics
A bubbled OR gate is equivalent to a

 AND gate
 X-OR gate
 NAND gate
 NOR gate

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Digital Electronics
11001, 1001 and 111001 correspond to the 2’scomplement representation of the following set of numbers

 -7, -7 and -7 respectively
 -6, -6 and -6 respectively
 25, 9 and 57 respectively
 -25, -9 and -57 respectively

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Digital Electronics
The number of comparators in a parallel conversion type 8-bit analog to digital converter is

  8.
  255.
 256.
 16.

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Digital Electronics
The output of a NAND gate is low

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

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Digital Electronics
When will be the output of an AND gate is HIGH if there are three inputs, A, B, and C ?

 A = 0, B = 0, C = 0
 A = 1, B = 0, C = 1
 A = 1, B = 1, C = 1
 A = 1, B = 1, C = 0

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Digital Electronics
Which is the example of digital device from the given option ?

 Record players
 Microprocessors
 Thermistors
 Sensors

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