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Free 1Z0-809 Exam Questions with First Attempt Pass Assurance

Question 1

The last statement inside main(String []) method, increments value of i, which means it is not effectively final and hence compilation error.

//Test.java

package com.udayan.ocp;

class Player {

String name;

int age;

Player() {

this.name = "Virat";

this.age = 29;

}

public int hashCode() {

return 100;

}

public class Test {

public static void main(String[] args) {

System.out.println(new Player());

}

Hexadecimal representation of 100 is 64.

Which of the following option is correct?

Options :

A : Code compiles successfully but throws an exception on executing it

B : Code compiles successfully and on execution always prints "com.udayan.ocp.Player@64" on to the console

C : Code doesn't compile successfully

D : None of the other options

Answer: B

Question 2

Given code of Test.java file:

1. package com.udayan.ocp;

3. import java.util.stream.Stream;

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 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

Question 4

Given code of Test.java file:

1. package com.udayan.ocp;

3. import java.util.Arrays;

4. import java.util.List;

5. import java.util.ListIterator;

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 5

Given the code fragment:

public class FileThread implements Runnable {

String fName;

public FileThread(String fName) { this.fName = fName; }

public void run () System.out.println(fName);}

public static void main (String[] args) throws IOException,

InterruptedException {

ExecutorService executor = Executors.newCachedThreadPool();

Stream<Path> listOfFiles = Files.walk(Paths.get(“Java Projects”));

listOfFiles.forEach(line -> {

executor.execute(new FileThread(line.getFileName().toString()));

line n1

});

executor.shutdown();

executor.awaitTermination(5, TimeUnit.DAYS); //

line n2

}

The Java Projects directory exists and contains a list of files.

What is the result?

Options :

A : The program throws a runtime exception at line n2.

B : The program prints files names concurrently

C : The program prints files names sequentially.

D : A compilation error occurs at line n1

Answer: B

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