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Digital Electronics

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

 01111100
 10111100
 00111100
 11000100

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Digital Electronics
A NAND gate is called a universal logic element because

It is used by everybody
All the minization techniques are applicable for optimum NAND gate realization
Many digital computers use NAND gates.
Any logic function can be realized by NAND gates alone

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Digital Electronics
The number of Boolean functions that can be generated by n variables is equal to

2n-1
2n
2n
22n

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Digital Electronics
Why generic array logic (GAL) device was invented ?

 Reprogrammable
None of these
 One-time programmable
 Mask programmable

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Digital Electronics
A Nibble is equal to ________ bit(s)

 8
 1
 4
 2

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Digital Electronics
X + X.Y = ?

 1
 Y
 0
 X

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