Java Constructor and Methods - Quiz

Q: What is the expected output?

public class Profile {
         private Profile(int w) { // line 1
                  System.out.print(w);
         }
         public static Profile() { // line 5
                  System.out.print (10);
         }
         public static void main(String args[]) {
                  Profile obj = new Profile(50);
         }
}

Q: What will be the return type of a method that not returns any value?

Q: The variables declared in a class for the use of all methods of the class are called

Q: What is the output of the program?

class Test{ 
        public int display(int x, int y){ 
                return ("The sum of x and y is " + x + y); 
        } 

        public static void main(String args[]){ 
                Test test = new Test();
                System.out.println(test.display(4,5)); 
        } 
}

Q: The main method should be static for the reason

Q: What is the output for the below code ?

1. public class A{
2.       int add(int i, int j){
3.             return i+j;
4.       }
5. }
6. public class B extends A{
7.       public static void main(String argv[]){
8.             short s = 9;
9.             System.out.println(add(s,6));
10.      }
11.}

Q: What will be the output?

public class Test{
      public static void main(String[] args){
            String value = "abc";
            changeValue(value);
            System.out.println(value);
      }

      public static void changeValue(String a){
            a = "xyz";
      }
}

Q: What is the output for the below code?

public class Test{
      public static void printValue(int i, int j, int k){
            System.out.println("int");
      }

      public static void printValue(byte...b){
            System.out.println("long");
      }

      public static void main(String... args){
            byte b = 9;
            printValue(b,b,b);
      }
}

Q: Which of these is a legal definition of a method named atnyla assuming it throws IOException, and returns void. Also assume that the method does not take any arguments. Select the one correct answer.

Q: What is the output of the following code?

public class Test{
        public static void main(String args[]){
                double[] myList = {1, 5, 5, 5, 5, 1};
                double max = myList[0];
                int indexOfMax = 0;
                for(int i = 1; i < myList.length; i++){
                        if(myList[i] > max){
                                max = myList[i];
                                indexOfMax = i;
                        }
                }
                System.out.println(indexOfMax);
        }
}