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Digital Electronics

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

 AND
 X-NOR
 NAND
 NOR

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Digital Electronics
The number of 1 in 8-bit representation of 127 in 2’s complement form is m and that in 1,s complement form is n. What is the value of m:n?

 1:1
 1:2
 2:1
 2:3

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Digital Electronics
The XS-3 code is a

 self-complementing code
 cyclic code
 weighted code
 error-correcting code

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Digital Electronics
Latches are ________ circuits.

 level triggered
 pulse triggered
 edge triggered
 count triggered

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Digital Electronics
The effect of stray magnetic field on the actuating torque of a portable instrument is maximum when the operating field of the instrument and the stray fields are

 Perpendicular.
  Parallel.
 Inclined at 30°.
 Inclined at 60°.

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Digital Electronics
The resolution of a 12 bit analog to digital converter in percent in

  0.02441.
 0.09760.
 0.04882.
  0.01220.

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