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Digital Electronics

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

  255.
  8.
 16.
 256.

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Digital Electronics
The momentary change in the output/state of the flip-flops is known as

 tri-state
 trigger
 unstable state
 inverter

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Digital Electronics
Most of the digital computers do not have floating point hardware because

Floating point hardware is costly
It is not possible to perform floating point addition by hardware
It is slower than software
Of no specific reason

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Digital Electronics
A NAND gate is called a universal logic element because

It is used by everybody
All the minization techniques are applicable for optimum NAND gate realization
Many digital computers use NAND gates.
Any logic function can be realized by NAND gates alone

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Digital Electronics
Which of the following is a digital device

 Microphone
 Resistance of a material
 Light switch
 Regulator of a fan

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Digital Electronics
What is the Boolean expression for a two-input AND gate ?

 A + B
 A & B
 A.B
 A - B

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