1z0-809 Exam Dumps - Oracle Java SE Questions and Answers

Given the code fragment:

List codes = Arrays.asList (“DOC”, “MPEG”, “JPEG”);

codes.forEach (c -> System.out.print(c + “ “));

String fmt = codes.stream()

.filter (s-> s.contains (“PEG”))

.reduce((s, t) -> s + t).get();

System.out.println(“\n” + fmt);

What is the result?

Given:

and the code fragment:

What is the result?

You have been asked to create a ResourceBundle which uses a properties file to localize an application.

Which code example specifies valid keys of menu1 and menu2 with values of File Menu and View Menu?

Given the code fragment:

List empDetails = Arrays.asList(“100, Robin, HR”,

“200, Mary, AdminServices”,

“101, Peter, HR”);

empDetails.stream()

.filter(s-> s.contains(“1”))

.sorted()

.forEach(System.out::println); //line n1

What is the result?

Given the code fragments:

interface CourseFilter extends Predicate {

public default boolean test (String str) {

return str.contains (“Java”);

}

}

and

List strs = Arrays.asList(“Java”, “Java EE”, “Embedded Java”);

Predicate cf1 = s - > s.length() > 3;

Predicate cf2 = new CourseFilter() { //line n1

public boolean test (String s) {

return s.startsWith (“Java”);

}

};

long c = strs.stream()

.filter(cf1)

.filter(cf2//line n2

.count();

System.out.println(c);

What is the result?

Given the code fragment:

Which statement can be inserted into line n1 to print 1,2; 1,10; 2,20;?

Given:

1. abstract class Shape {

2. Shape ( ) { System.out.println (“Shape”); }

3. protected void area ( ) { System.out.println (“Shape”); }

4. }

5.

6. class Square extends Shape {

7. int side;

8. Square int side {

9./* insert code here */

10. this.side = side;

11. }

12. public void area ( ) { System.out.println (“Square”); }

13. }

14. class Rectangle extends Square {

15. int len, br;

16. Rectangle (int x, int y) {

17. /* insert code here */

18. len = x, br = y;

19. }

20. void area ( ) { System.out.println (“Rectangle”); }

21. }

Which two modifications enable the code to compile? (Choose two.)

Given:

class Sum extends RecursiveAction { //line n1

static final int THRESHOLD_SIZE = 3;

int stIndex, lstIndex;

int [ ] data;

public Sum (int [ ]data, int start, int end) {

this.data = data;

this stIndex = start;

this. lstIndex = end;

}

protected void compute ( ) {

int sum = 0;

if (lstIndex – stIndex <= THRESHOLD_SIZE) {

for (int i = stIndex; i < lstIndex; i++) {

sum += data [i];

}

System.out.println(sum);

} else {

new Sum (data, stIndex + THRESHOLD_SIZE, lstIndex).fork( );

new Sum (data, stIndex,

Math.min (lstIndex, stIndex + THRESHOLD_SIZE)

).compute ();

}

}

}

and the code fragment:

ForkJoinPool fjPool = new ForkJoinPool ( );

int data [ ] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

fjPool.invoke (new Sum (data, 0, data.length));

and given that the sum of all integers from 1 to 10 is 55.

Which statement is true?

Given the code fragment:

Stream files = Files.walk(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?