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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
A ROM has a 16-bit address bus. The number of locations in this memory is

 32
 1024
 16
 65536

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Digital Electronics
An any or all gate is the other name of

 AND gate
 OR gate
 X-NOR gate
 X-OR gate

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Digital Electronics
Which of the following is 2’s complement of +12?

 00001100
 01110011
 00000011
 00001000

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Digital Electronics
The following code is not a BCD code.

 Gray code
 XS-3 code
 all of these
 8421 code

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Digital Electronics
The decimal equivalent of the highest possible address for an 8-bit address bus is

 255
 8
 128
 256

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