Question

Which one is used for logical manipulations?

(a) 2’s complement

(b) 9’s complement

(c) 1’s complement

(d) 10’s complement

This question was posed to me in examination.

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

Answer 1

Correct answer is (c) 1’s complement

Easy explanation: For logical manipulations, 1’s complement is used, as all logical operations take place with binary numbers.