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The 2’s complement of 5 is ______________

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The 2’s complement of 5 is ______________

(a) 1011

(b) 0101

(c) 1010

(d) 0011

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This intriguing question comes from Positional & Non-Positional Number System topic in portion Number Systems of Computer Fundamentals

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The correct answer is (a) 1011

The best explanation: The 2’s complement is obtained by adding 1 to the 1s complement of a number. The 1’s complement of 5(0101) is 1010. For 2’s complement : 1010+1=1011.

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