Digital Electronics
Statement(A): 2’s complement arithmetic is preferred in digital computers. Statement(R):The Hardware required to obtain the 2’s complement of a number is simple.

 Both A & R are true and R is the correct explanation of A
 A is false but R is true
 A is true but R is false
 Both A & R are true but R is not the correct explanation of A

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Digital Electronics
In K-map simplification, a group of four adjacent 1s leads to a term with

 two literals less than the total number of variables
 four literals less than the total number of variables
 three literals less than the total number of variables
 one literal less than the total number of variables

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