Free Oracle 1Z0-808 Exam Questions

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 str1 = " ";

         boolean b1 = str1.isEmpty();

         System.out.println(b1);

         str1.trim();

         b1 = str1.isEmpty();

         System.out.println(b1);

     }

}

Consider below codes of 2 java files:

1. //Flyable.java

2. package com.sampleproject.oca;

3.  

4. public interface Flyable {

5.     static int horizontalDegree() { //Line n1

6.         return 20;

7.     }

8.  

9.     default void fly() {

10.         System.out.println("Flying at " + horizontalDegree() + " degrees."); //Line n2

11.     }

12.  

13.     void land();

14. }

1. //Aeroplane.java

2. package com.sampleproject.oca;

3.  

4. public class Aeroplane implements Flyable {

5.     public void land() {

6.         System.out.println("Landing at " + -Flyable.horizontalDegree() + " degrees."); //Line n3

7.     }

8.  

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

10.         new Aeroplane().fly();

11.         new Aeroplane().land();

12.     }

13. }

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

Given code of Test.java file:

1. package com.sampleproject.oca;

2.  

3. interface Blogger {

4.     default void blog() throws Exception {

5.         System.out.println("GENERIC");

6.     }

7. }

8.  

9. class TravelBlogger implements Blogger {

10.     public void blog() {

11.         System.out.println("TRAVEL");

12.     }

13. }

14.  

15. public class Test {

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

17.         Blogger blogger = new TravelBlogger(); //Line n1

18.         ((TravelBlogger)blogger).blog(); //Line n2

19.     }

20. }

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

Which of the following is a checked Exception?

Given the code fragment: