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Digital Electronics

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

 01111100
 11000100
 00111100
 10111100

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Digital Electronics
Logic circuits are

 hybrid circuits
 analog circuits
 digital circuits
 none of these

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Digital Electronics
A binary number system is of base ________

 4
 10
 2
 1

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Digital Electronics
8421 code is

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

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Digital Electronics
NOT gates are to be added to the inputs of which gate to convert it to a NOR gate?

 X-NOR
 AND
 NAND
 OR

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Digital Electronics
The binary equivalent of hexadecimal number 4F2D is

 0100 1111 0010 1100
 0100 1110 0010 1101
 0100 1111 0010 1101
 0101 1111 0010 1100

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