Question

The 1’s complements requires _________

(a) One operation

(b) Two operations

(c) Three operations

(d) Combined Operations

This question was posed to me in final exam.

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

Answer 1

Right choice is (a) One operation

To explain: Only one operation is required for 1’s complement operation. This includes only inversion of 1’s to 0’s and 0’s to 1’s.