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1’s complement of 1011101 is ____________

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1’s complement of 1011101 is ____________

(a) 0101110

(b) 1001101

(c) 0100010

(d) 1100101

I got this question during an online exam.

This key question is from 1’s, 2’s, 9’s & 10’s Complements topic in chapter Number System and Codes of Digital Circuits

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The correct answer is (c) 0100010

The explanation: 1’s complement of a binary number is obtained by reversing the binary bits. All the 1’s to 0’s and 0’s to 1’s.

Thus, 1’s complement of 1011101 = 0100010.

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