ISRO exam 2017 – Question 54 with Solution

In this video we are going to discuss another question which was asked in the exam of ISRO

54. Consider the following C function void swap

( int x, int y )
{
int tmp; tmp = x; x= y;
y = tmp;
}
In order to exchange the values of two variables a and b:

•  Call swap (a, b)
•  Call swap (&a, &b)
•  swap(a, b) cannot be used as it does not return any value
•  swap(a, b) cannot be used as the parameters passed by value