What is the output of the Java code given below?

String color[] = {"Blue", "Red", "Violet"};
System.out.println(color[2].length());

1. 6
2. 5
3. 3
4. 2

Which of the following mathematical methods returns only an integer?

1. Math.ceil(n)
2. Math.sqrt(n)
3. Math.floor(n)
4. Math.round(n)

Evaluate the expression when x is 4:

x += x++ * ++x % 2;

Rewrite the following do while program segment using for:

x = 10; y = 20;
do
{
    x++;
    y++;
} while (x<=20);
System.out.println(x * y );