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Digital Electronics

Digital Electronics
The hex address of the 256th memory location is

 00100
 00FFF
 000FF
 001FF

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

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

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Digital Electronics
What is the 2’s complement of 10110000?

 01001111
 10110000
 01010000
 10001110

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Digital Electronics
The output of a gate is HIGH if and only if all its inputs are LOW. It is true for

 NOR
 NAND
 X-OR
 X-NOR

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Digital Electronics
It is desired to have a 64 × 8 ROM. The ROMs available are of 16 × 4 size. The number of ROMs required will be

 4
 8
 6
 2

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Digital Electronics
A gate is enabled when its enable input is at logic 0. The gate is

 none of these
 NAND
 NOR
 AND

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