Which three are valid method signatures in an interface?

1. private int getArea();
2. public float getVol(float x);
3. public void main(String [] args);
4. public static void main(String [] args);
5. boolean setFlag(Boolean [] test);
   

You want a class to have access to members of another class in the same package. Which is the most restrictive access that accomplishes this objective?

What is the narrowest valid returnType for methodA in line 3?

public class ReturnIt 
{ 
    returnType methodA(byte x, double y) /* Line 3 */
    { 
        return (long)x / y * 2; 
    } 
}

class A 
{  
    protected int method1(int a, int b) 
    {
        return 0; 
    } 
}

Which is valid in a class that extends class A?

Which one creates an instance of an array?

Which two of the following are legal declarations for nonnested classes and interfaces?

1. final abstract class Test {}
2. public static interface Test {}
3. final public class Test {}
4. protected abstract class Test {}
5. protected interface Test {}
6. abstract public class Test {}
   

Which of the following class level (nonlocal) variable declarations will not compile?

Which two cause a compiler error?

1. float[ ] f = new float(3);
2. float f2[ ] = new float[ ];
3. float[ ]f1 = new float[3];
4. float f3[ ] = new float[3];
5. float f5[ ] = {1.0f, 2.0f, 2.0f};
   

Given a method in a protected class, what access modifier do you use to restrict access to that method to only the other members of the same class?

Which is a valid declaration within an interface?