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Digital Electronics

Digital Electronics
Which one of the following is 2’s complement of -68?

 10111100
 00111100
 11000100
 01111100

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Digital Electronics
The 2s complement of 17 is

 111110.
 110001.
 101110.
  101111.

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Digital Electronics
To get an excess-3 code from BCD code

 0110 is subtracted
 0110 is added
 0011 is added
 0011 is subtracted

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Digital Electronics
In Boolean algebra AND is represented by

 +
 /
 ×
 -

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Digital Electronics
What is the gray code for the binary 101011?

 111110
 011111
 101011
 110101

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Digital Electronics
Complement of XNOR and NOR is ________ and ________ respectively.

 XOR, OR
 OR, NOR
 NOR, XNOR
 XOR, NOR

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