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Digital Electronics

Digital Electronics
What is the minimum number of 2 input NAND gates used to perform the function of 2 input OR gate

 4
 2
 1
 3

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Digital Electronics
What is the requirement of fullsubstractor circuit ?

 Two inputs and three outputs
 Two inputs and two outputs
 Three inputs and two outputs
 Three inputs and one output

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Digital Electronics
X + X.Y = ?

 0
 Y
 1
 X

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Digital Electronics
Excess-3 code is known as

Algebraic code
Weighted code
Cyclic redundancy code
Self-complementing code

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Digital Electronics
The output of a gate is HIGH when at least one of its inputs is LOW. It is true for

 OR
 NAND
 NOR
 X-OR

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Digital Electronics
The number A = 01110000 and B = 10101111 are in 2’s complement form .Addition of above two number is

 011100001
 10101111
 11100000
 00011111

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