Free Oracle 1Z0-808 Exam Questions

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

package com.udayan.oca;

public class Test {

     private static void add(double d1, double d2) {

         System.out.println("double version: " + (d1 + d2));

     }

     private static void add(Double d1, Double d2) {

        System.out.println("Double version: " + (d1 + d2));

     }

     public static void main(String[] args) {

         add(10.0, null);

     }

}

Which statement best describes encapsulation?

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

package com.udayan.oca;

public class Test {

     public static void main(String[] args) {

         String str = "Java Rocks!";

         System.out.println(str.length() + " : " + str.charAt(10));

     }

}

Consider below code: 

1. //Test.java

2. package com.udayan.oca;

3.  

4. import java.time.LocalDate;

5.  

6. public class Test {

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

8.          LocalDate joiningDate = LocalDate.parse("2006-03-16");

9.          System.out.println(joiningDate.withDayOfYear(29));

10.      }

11. }

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. interface Perishable1 {

4.     default int maxDays() {

5.         return 1;

6.     }

7. }

8.  

9. interface Perishable2 extends Perishable1 {

10.     default int maxDays() {

11.         return 2;

12.     }

13. }

14.  

15. class Milk implements Perishable2, Perishable1 {}

16.  

17. public class Test {

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

19.         Perishable1 obj = new Milk();

20.         System.out.println(obj.maxDays());

21.     }

22. }

Which of the following statements is correct?