Online 1Z0-809 Practice Test

Question 1

Given:

and the code fragment:

Which two code fragments, when inserted at line n1 independently, enable the code to print

TruckCarBike?

Options :

A : .sorted ((v1, v2) -> v1.getVId() < v2.getVId())

B : .sorted (Comparable.comparing (Vehicle: :getVName)).reversed ()

C :

.map (v -> v.getVid())

.sorted ()

D : .sorted((v1, v2) -> Integer.compare(v1.getVId(), v2.getVid()))

E : .sorted(Comparator.comparing ((Vehicle v) -> v.getVId()))

Answer: A,D

Question 2

Given the code fragments:

and

What is the result?

Options :

A : null

B : A compilation error occurs.

C : DogCatMouse

D : [Dog, Cat, Mouse]

Answer: D

Question 3

Given the code fragment:

What is the result?

Options :

A : A compilation error occurs at line n2.

B : 3

C :

2

D : A compilation error occurs at line n1.

Answer: A

Question 4

Given the code fragment:

Stream<Path> files = Files.list(Paths.get(System.getProperty(“user.home”)));

files.forEach (fName -> { //line n1

try {

Path aPath = fName.toAbsolutePath(); //line n2

System.out.println(fName + “:”

+ Files.readAttributes(aPath,

Basic.File.Attributes.class).creationTime

());

} catch (IOException ex) {

ex.printStackTrace();

});

What is the result?

Options :

A :

All files and directories under the home directory are listed along with their attributes.

B : A compilation error occurs at line n1.

C : The files and folders in the home directory are listed along with their attributes.

D : A compilation error occurs at line n2.

Answer: C

Question 5

Given code of Test.java file:

package com.udayan.ocp;

import java.util.concurrent.*;

public class Test {

public static void main(String[] args) throws InterruptedException, ExecutionException {

ExecutorService es = Executors.newSingleThreadExecutor();

Future f = es.submit(() -> "HELLO");

System.out.println(f.get());

es.shutdown();

}

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

Options :

A : An exception is thrown at runtime

B : HELLO

C : Compilation error

D : null

Answer: B

EXPERTY DESIGNED 1Z0-809 PRACTICE TEST