Consider the following class definition.public class Cylinder
{
Private double baseRadius;
Private double height; public Cylinder ()
{
BaseRadius = 0;
Height = 0;
} public Cylinder (double l, double h)
{
BaseRadius = l;
Height = h;
} public void set(double r, double h)
{
BaseRadius = r;
Height = h;
} public String toString()
{
Return (baseRadius + " " + height) ;
} public double SurfaceArea()
{
Return 2 * 3.14 * baseRadius * height;
} public double volume()
{
Return 3.14 * baseRadius * baseRadius * height;
}
}Suppose that you have the following declaration. Cylinder cyl = new Cylinder(1.5, 10) ;Which of the following sets of statements are valid in Java?
(i)
Cyl.surfaceArea() ;
Cyl.volume() ;
Cyl.print() ;
(ii)
Print(cyl.surfaceArea) ;
Print(cyl.volume() ) ;

A) Only (i)
B) Only (ii)
C) Both (i) and (ii)
D) None of these

Question

Manpreet Sandhu · Accepted Answer

Final Answer : D, Explanation :  The correct syntax to call methods in Java involves using parentheses, so `Cyl.surfaceArea();` and `Cyl.volume();` are valid calls. However, `Cyl.print();` is not valid because there is no `print` method defined in the `Cylinder` class. Similarly, `Print(cyl.surfaceArea);` is incorrect because `surfaceArea` is a method, not a property, and should be called with parentheses (`cyl.surfaceArea()`). Additionally, Java uses `System.out.println()` for printing, not `Print()`. Therefore, none of the sets of statements are valid as per the given class definition and Java syntax.

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