The new Oracle 1Z0-809 exam questions cover real topics from the latest Java SE 8 Programmer II release. Each question helps you review dificult key areas and understand how the Oracle Java system works in real scenarios. Practice regularly with updated version of 1Z0 809 dumps, focus on weak points, prepare for your desired test effectively and pass your Oracle certification exam confidently on your first try.
Given the code fragment:
Given code of Test.java file:
1. package com.udayan.ocp;
2.
3. import java.time.*;
4.
5. public class Test {
6. public static void main(String [] args) {
7. System.out.println(Duration.ofDays(-2));
8. }
9. }
What will be the result of compiling and executing Test class?
Given code of Test.java file:
1. package com.udayan.ocp;
2.
3. import java.util.Arrays;
4. import java.util.Comparator;
5. import java.util.List;
6.
7. class Person {
8. private String firstName;
9. private String lastName;
10.
11. public Person(String firstName, String lastName) {
12. this.firstName = firstName;
13. this.lastName = lastName;
14. }
15.
16. public String getFirstName() {
17. return firstName;
18. }
19.
20. public String getLastName() {
21. return lastName;
22. }
23.
24. public String toString() {
25. return "{" + firstName + ", " + lastName + "}";
26. }
27. }
28.
29. public class Test {
30. public static void main(String[] args) {
31. List
32. new Person("Tom", "Riddle"),
33. new Person("Tom", "Hanks"),
34. new Person("Yusuf", "Pathan"));
35. list.stream().sorted(Comparator.comparing(Person::getFirstName).reversed()
36. .thenComparing(Person::getLastName)).forEach(System.out::println);
37. }
38. }
What will be the result of compiling and executing Test class?
Given code of Test.java file:
1. package com.udayan.ocp;
2.
3. import java.util.Arrays;
4. import java.util.List;
5. import java.util.function.Predicate;
6.
7. public class Test {
8. public static void main(String[] args) {
9. List
10. Predicate
11. int ctr = 1;
12. boolean result = num > 0;
13. System.out.print(ctr++ + ".");
14. return result;
15. };
16.
17. list.stream().filter(predicate).findFirst();
18. }
19. }
What will be the result of compiling and executing Test class?
Consider the code of Greet.java file:
1. package com.udayan.ocp;
2.
3. public final class Greet {
4. private String msg;
5. public Greet(String msg) {
6. this.msg = msg;
7. }
8.
9. public String getMsg() {
10. return msg;
11. }
12.
13. public void setMsg(String msg) {
14. this.msg = msg;
15. }
16. }
Is Greet class an immutable class?
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