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Digital Electronics

Digital Electronics
A bubbled OR gate is equivalent to a

 NOR gate
 NAND gate
 X-OR gate
 AND gate

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Digital Electronics
The voltage levels for positive logic system

 must necessarily be 0 V and 5 V
 must necessarily be negative
 may be positive or negative
 must necessarily be positive

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Digital Electronics
A gate is inhibited when its inhibit input is at logic 1. The gate is

 AND
 NAND
 none of these
 OR

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Digital Electronics
To add two m-bit numbers, the required number of half adder is

 2m-1
 2m
 2m-1
 2m+1

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Digital Electronics
A self-complementing code for the decimal digits is created using the weight 4 4 3 -2. The value of 8592 in the code is

 1100 0111 1111 0011
 1100 1001 1111 1000
 1100 1011 1111 1001
 1000 0101 1001 0010

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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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