UGC NET CSE | December 2005 | Part 2 | Question: 8

Question

Consider the following sequence of instructions : 

$a= a \oplus b, b= a \oplus b, a= b \oplus a$  This Sequence

• A. retains the value of the $a$ and $b$
• B. complements the value of $a$ and $b$
• C. swap $a$ and $b$
• D. negates values of $a$ and $b$

Answer 1

a=a⨁b

b=a⨁b

a= b⨁a

Let, a=1, b=0

a= 1⨁ 0= 1=> a=1

b= 1⨁ 0=1 => b=1

a= 1⨁1= 0=> a=0

Hence, a=0, b=1.

It can be seen that above statements swap the values of a and b.