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Digital Electronics

Digital Electronics
What logic function is produced by adding an inverter to each input and output of an AND gate?

 OR
 X-OR
 NOR
 NAND

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Digital Electronics
The implicants which will definitely occur in the final expression are called

 essential prime implicants
 prime implicants
 selective prime implicants
 redundent prime implicants

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Digital Electronics
Which of the following gates cannot be used as an inverter?

 NOR
 NAND
 X-NOR
 AND

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

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Digital Electronics
What is the requirement of fullsubstractor circuit ?

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

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Digital Electronics
In Boolean algebra A.A is equal to

 A²
 2A
 A
 1

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