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

Given code of Test.java file:

1. package com.udayan.ocp;

2.

3. import java.util.stream.Stream;

4.

5. public class Test {

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

7. System.out.println(Stream.of(10, 0, -10).sorted().findAny().orElse(-1));

8. }

9. }

Which of the following statements are true about the execution of Test class?

Select 2 options.

Options :

A : It will never print -1 on to the console.

B : It can print any number from the stream.

C : It will always print -10 on to the console.

D : It will always print 0 on to the console.

E : It will always print 10 on to the console.

Answer: A,B

Question 3

Given:

From what threading problem does the program suffer?

Options :

A : race condition

B : deadlock

C : starvation

D : livelock

Answer: B

Question 4

Given:

public class Counter {

public static void main (String[ ] args) {

int a = 10;

int b = -1;

assert (b >=1) : “Invalid Denominator”;

int с = a / b;

System.out.println (c);

}

What is the result of running the code with the –da option?

Options :

A : -10

B : 0

C : An AssertionError is thrown.

D : A compilation error occurs.

Answer: A

Question 5

Given the code fragment:

Path p1 = Paths.get(“/Pics/MyPic.jpeg”);

System.out.println (p1.getNameCount() +

“:” + p1.getName(1) +

“:” + p1.getFileName());

Assume that the Pics directory does NOT exist.

What is the result?

Options :

A : An exception is thrown at run time

B : 2:MyPic.jpeg: MyPic.jpeg

C : 3:.:MyPic.jpeg

D : 2:Pics: MyPic.jpeg

Answer: B

EXPERTY DESIGNED 1Z0-809 PRACTICE TEST