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Digital Electronics

Digital Electronics
The decimal equivalent of hexadecimal number of 2A0F is

 17067
 17670
 10767
 17607

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

 NOR
 NAND
 AND
 none of these

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Digital Electronics
The fan put of a 7400 NAND gate is

5TTL
10TTL
2TTL
8TTL

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Digital Electronics
How many NOR gates are required to obtain AND operation?

 4
 3
 2
 1

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

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

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Digital Electronics
The maximum positive and negative numbers which can be represented in two’s complement form using n bits are respectively,

 +(2n-1-1),-(2n-1-1)
 +(2n-1-1),-2n-1
 +2n-1,-(2n-1+1)
 +2n-1,-2n-1

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