6 6 votes Consider this GATE 2003 question: https://gateoverflow.in/937/gate2003-46 Here, instead of XOR gates we had OR gates, then which of the following operations can we perform? $A + B, A - B\ and\ A + 1$ CO & Architecture gatecse-2003 adder + – Rishabh Gupta 2 2.2k views answer comment Share Follow Print See all 6 Comments 6 6 Comments reply joshi_nitish commented Nov 3, 2017 reply Follow flag if 2's complement arthemetic is used, then among given options only A+B can be manipulated.. 0 0 replyShare Rishabh Gupta 2 commented Nov 3, 2017 reply Follow flag What do you mean by "if 2's complement arthemetic is used" ?? And what about A + 1. when K = 1 and C0 = 0 ?? 0 0 replyShare Anu007 commented Nov 3, 2017 reply Follow flag yes A+B when k= 1 and c=0 A+1 again cannot perform. with AND gate we can perform that A-B is also not perform. 2 2 replyShare joshi_nitish commented Nov 3, 2017 reply Follow flag And what about A + 1. when K = 1 and C0 = 0 ?? it will not perform A+1 in this case, instead it will perform A-1.... it will be like, an-1an-2an-3.....a0 + 1111.....11 // all 1's in 2's complement represent -1, so finally it will be an-1an-2an-3.....a0 - 1 = A-1 8 8 replyShare Rishabh Gupta 2 commented Nov 3, 2017 reply Follow flag Thanks :) 1 1 replyShare neeraj_bhatt commented Nov 5, 2019 reply Follow flag @joshi_nitish The A-1 part was really good. Thanks. 0 0 replyShare Please log in or register to add a comment.
