Observe the following code and write how many times will the loop execute?

a = 5; 
b = 2;
while(b != 0)
{
    r = a % b; 
    a = b; 
    b = r;
}
System.out.println(" " + a);

Write the values that will be assigned to x, y and t after executing the following code.

String s1, s2, x, y;
int t; 
s1 = "classxii"; 
s2 = "cbseboard";
x = s1.substring(5, 8); 
y = s2.concat(s1);
t = y.length();
System.out.println("x=" + x);
System.out.println("y=" + y);
System.out.println("t=" + t);

The following code has some error(s). Rewrite the correct code and underlining all the corrections made.

integer counter = 0; 
i = 10; num;
for (num = i; num >= 1; num--);
{
    If i % num = 0
    {
        counter = counter + 1;
    }
}

Rewrite the following program segment using while instead of for loop.

int f = 1, i; 
for(i = 1; i <= 5 ; i++)
{
    f *= i; 
    System.out.println(f);
}