1z0-809 Java SE 8 Programmer II (OCP) Practice Questions

Given the code fragments:

4. void doStuff() throws ArithmeticException, NumberFormatException, Exception {

5. if (Math.random() )-1 throw new Exception (“Try again');

6. }

and

24. try {

25. doStuff ( ):

26. } catch (ArithmeticException | NumberFormatException | Exception e) {

27. System.out.println (e.getMessage()); }

28. catch (Exception e) {

29. System.out.println (e.getMessage()); }

}

Which modification enables the code to print Try again?

Given the definition of the Country class:

public class country {

public enum Continent {ASIA, EUROPE}

String name;

Continent region;

public Country (String na, Continent reg) {

name = na, region = reg;

}

public String getName () {return name;}

public Continent getRegion () {return region;}

}

and the code fragment:

List(Country) couList = Arrays.asList (

new Country (“Japan', Country.

Continent.

ASIA),

new Country (“Italy', Country.

Continent.

EUROPE),

new Country (“Germany', Country.

Continent.

EUROPE));

Map(Country.

Continent, List(String)) regionNames = couList.stream ()

.collect(Collectors.groupingBy (Country ::getRegion,

Collectors.mapping(Country::getName, Collectors.toList()))));

System.out.println(regionNames);

What is the output?

Given the code fragment:

Map(Integer, String) books = new TreeMap()();

books.put (1007, “A');

books.put (1002, “C');

books.put (1001, “B');

books.put (1003, “B');

System.out.println (books);

What is the result?

Given:

class Book {

int id;

String name;

public Book (int id, String name) {

this.id = id;

this.name = name;

}

public boolean equals (Object obj) { //line n1

boolean output = false;

Book b = (Book) obj;

if (this.name.equals(b name))}

output = true;

}

return output;

}

}

and the code fragment:

Book b1 = new Book (101, “Java Programing');

Book b2 = new Book (102, “Java Programing');

System.out.println (b1.equals(b2)); //line n2

Which statement is true?

Given the content of /resourses/Message.properties:

welcome1='Good day!'

and given the code fragment:

Properties prop = new Properties ();

FileInputStream fis = new FileInputStream (“/resources/Message.properties');

prop.load(fis);

System.out.println(prop.getProperty(“welcome1'));

System.out.println(prop.getProperty(“welcome2', “Test'));//line n1

System.out.println(prop.getProperty(“welcome3'));

What is the result?

Which action can be used to load a database driver by using JDBC3.0?

A systems administrator needs to write a script to find all symbolic links within the /usr/bin directory tree. Which NIO.2 code fragment correctly achieves this?

Given the definition of the Vehicle class:

Class Vehicle {

int distance;

Vehicle (int x) {

this distance = x;

}

public void increSpeed(int time) {

int timeTravel = time; //line n1

//line n3

class Car {

int value = 0;

public void speed () {

value = distance /timeTravel;//line n2

System.out.println (“Velocity with new speed'+value+'kmph');

}

}

speed();//line n3

}

}

and this code fragment:

Vehicle v = new Vehicle (100);

v.increSpeed(60);

What is the result?

Given:

IntStream stream = IntStream.of (1,2,3);

IntFunction(Integer) inFu= x -) y -) x*y;//line n1

IntStream newStream = stream.map(inFu.apply(10));//line n2 newStream.forEach(System.out::print);

Which modification enables the code fragment to compile?

Given the code fragment:

List(Integer) values = Arrays.asList (1, 2, 3);

values.stream ()

.map(n -) n*2)//line n1

.peek(System.out::print)//line n2

.count();

What is the result?