____________ programmers specialize in developing system software such as operating systems, device drivers, security modules, and communications software.?

What is the difference between grouping and stacking panels?

What will be an ideal response?

Consider the following statements.public class Circle{   private double radius;   public Circle()   {      radius = 0.0;   }   public Circle(double r)   {      radius = r;   }   public void set(double r)   {      radius = r;   }   public void print()   {       System.out.println(radius + " " + area + " "                         + circumference);   }   public double area()   {       return 3.14 * radius * radius;   }   public double circumference()   {       return 2 * 3.14 * radius;   }}Circle myCircle = new Circle();double r;Which of the following statements are valid in Java? (Assume that console is Scanner object initialized to the standard input device.)(i)     r =

console.nextDouble();    myCircle.area = 3.14 * r * r;    System.out.println(myCircle.area);(ii)        r = console.nextDouble();          myCircle.set(r);   System.out.println(myCircle.area()); A. Only (i)      B. Only (ii) C. Both (i) and (ii)      D. None of these