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Which representation is most efficient to perform arithmetic operations on the numbers?

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Which representation is most efficient to perform arithmetic operations on the numbers?

(a) Sign-magnitude

(b) 1’s complement

(c) 2’S complement

(d) None of the mentioned

The question was posed to me in quiz.

The question is from Numbers and Arithmetic Operations in section Machine Instructions and Programs of Computer Architecture

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Right choice is (c) 2’S complement

The explanation is: The two’s complement form is more suitable to perform arithmetic operations as there is no need to involve the sign of the number into consideration.

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