In the following Java code, which call to sum() method is appropriate?

class Output 
{
 
        public static int sum(int ...x)
        {
             return; 
        }
        static void main(String args[]) 
        {    
             sum(10);
             sum(10,20);
             sum(10,20,30);
             sum(10,20,30,40);
        } 
}

What is a constructor in Java?

A. A special method to create instances of classes

B. A method used for mathematical calculations

C. A method to perform string manipulations

D. An exception handling mechanism

Which keyword is used to define a method in Java?

A. method

B. def

C. func

D. public

In Java, which method is automatically called when an object is created?

A. start()

B. main()

C. init()

D. constructor()

What is method overloading in Java?

A. Defining multiple methods with the same name in the same class

B. Calling methods from another class

C. Using methods to load data from a file

D. Running methods in parallel threads