Free Oracle 1Z0-808 Exam Questions

Consider below code of Test.java file:

1. package com.sampleproject.oca;

2.  

3. class Super {

4.     public String num = "10"; //Line n1

5. }

6.  

7. class Sub extends Super {

8.     protected int num = 20; //Line n2

9. }

10.  

11. public class Test {

12.     public static void main(String[] args) {

13.         Super obj = new Sub();

14.         System.out.println(obj.num += 2); //Line n3

15.     }

16. }

What will be the result of compiling and executing above code?

What will be the result of compiling and executing Test class?

package com.udayan.oca;

public class Test {

    public static void main(String[] args) {

        m1(null);

    }

    static void m1(CharSequence s) {

        System.out.println("CharSequence");

    }

    static void m1(String s) {

        System.out.println("String");

    }

    static void m1(Object s) {

        System.out.println("Object");

    }

}

Which of the following are Java Exception classes?

Select 3 options.

Consider below code:

1. //Test.java

2. package com.udayan.oca;

3.  

4. public class Test {

5.     public static void main(String[] args) {

6.         StringBuilder sb = new StringBuilder(100);

7.         System.out.println(sb.length() + ":" + sb.toString().length());

8.     }

9. }

What will be the result of compiling and executing Test class?

Consider below code of Test.java file:

1. package com.sampleproject.oca;

2.  

3. public class Test {

4.     public static void main(String[] args) {

5.         String [][] arr = { {"%", "$$"}, {"***", "@@@@", "#####"}};

6.         for(String [] str : arr) {

7.             for(String s : str) {

8.                 System.out.println(s);

9.                 if(s.length() == 4) //Line n1

10.                     break; //Line n2

11.             }

12.             break; //Line n3

13.         }

14.     }

15. }

What will be the result of compiling and executing Test class?