Consider the following C function:

void swap (int a, int b)
{
   int temp;
   temp = a;
   a = b;
   b = temp;
}

In order to exchange the values of two variables x and y.

Consider the following C program

main ( )
{
  int x, y, m, n;
  scanf("%d %d", &x, &y);
  /* Assume x > 0 and y > 0 */
  m=x; n=y;
  while(m!=n)
  {
    if(m>n)
    m=m-n;
    else
    n=n-m;
  }
  printf("%d", n);
}

The program computes

Consider the following C function:

int f(int n)
{
static int i = 1;
if(n>=5) return n;
n = n+1;
i++;
return f(n);
}

The value returned by f(1) is

Choose the best matching between the programming style in Group 1 and their characteristics in Group 2

Group 1
P. Functional
Q. Logic
R. Object-oriented
S. Imperative

Group 2
1. Command-based, procedural
2. Imperative, abstract data types
3. Side-effect free, declaretive, expression Evaluation
4. Declaretive, clausal representation, theorem proving