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Digital Electronics

Digital Electronics
The 2s complement of 17 is

 101110.
 110001.
  101111.
 111110.

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Digital Electronics
The output of a logic gate is 0 when all its inputs are at logic 0. The gate is either

 a NAND or an X-OR
 an OR or an X-OR
 an OR or an X-NOR
 an AND or a NOR

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Digital Electronics
Why decoder is used in the digital electronics ?

 To convert non coded information into coded form
 To convert coded information into non coded form
None of these
 It is used to separate address bus and data bus

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

  255.
 16.
  8.
 256.

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Digital Electronics
What is the logic which controls a stair case light associated with two switches A and B located at the bottom and top of the stair case respectively?

 X-NOR
 AND
 OR
 X-OR

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Digital Electronics
8421 code is

 self-complementing code
 non-weighted code
 alphanumeric code
 weighted code

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MORE MCQ ON Digital Electronics

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