Online 1Z0-809 Practice Test

Question 1

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.ListIterator;

6.

7. public class Test {

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

9. List list = Arrays.asList("T", "S", "R", "I", "F");

10. ListIterator iter = list.listIterator(2);

11. while(iter.hasNext()) {

12. System.out.print(iter.next());

13. }

14. }

15. }

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

Options :

A : IF

B : RIF

C : Runtime Exception

Answer: B

Question 2

Assume that proper import statements are available, and 'fr' is the language code for French language.

And you have the following code snippet:

Locale [] loc = Locale.getAvailableLocales();

Which of the following statements will print all the supported (by the JVM) French Language Locale on to the console?

Select 2 options.

Options :

A : Arrays.stream(loc).filter(x -> x.getLanguage().contains("FR")).forEach(System.out::println);

B : Arrays.stream(loc).filter(x -> x.toString().contains("FR")).forEach(System.out::println);

C : Arrays.stream(loc).filter(x -> x.getLanguage().equals("fr")).forEach(System.out::println);

D : Arrays.stream(loc).filter(x -> x.toString().startsWith("fr")).forEach(System.out::println);

E : Arrays.stream(loc).filter(x -> x.startsWith("fr")).forEach(System.out::println);

Answer: C,D

Question 3

Given the code fragment:

List<String> colors = Arrays.asList(“red”, “green”, “yellow”);

Predicate<String> test = n - > {

System.out.println(“Searching…”);

return n.contains(“red”);

};

colors.stream()

.filter(c -> c.length() > 3)

.allMatch(test);

What is the result?

Options :

A : Searching...

B :

Searching...

C :

Searching...

D : A compilation error occurs.

Answer: A

Question 4

Given code of Test.java file:

1. package com.udayan.ocp;

2.

3. public class Test {

4. private static String msg = "Hello";

5.

6. private static String changeMsg(String m) {

7. msg = m;

8. return null;

9. }

10.

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

12. if(args.length == 0) {

13. assert false : changeMsg("Bye");

14. }

15. System.out.println(msg);

16. }

17. }

What will be the result of executing Test class with below command?

java -ea com.udayan.ocp.Test

Options :

A : Bye

B : Hello

C : AssertionError is thrown at runtime and program terminates abruptly

Answer: C

Question 5

Given the code fragment:

You have been asked to define the ProductCode class. The definition of the ProductCode class must

allow c1 instantiation to succeed and cause a compilation error on c2 instantiation.

Which definition of ProductCode meets the requirement?

Options :

A :

B :

C :

D :

Answer: B

EXPERTY DESIGNED 1Z0-809 PRACTICE TEST