Given the content: and given the code fragment: Which two code fragments, when inserted at line 1 independently, enable the code to print “Wie geht’s?”

Which two are elements of a singleton class? (Choose two.)

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

Given the code fragment: Path file = Paths.get (“courses.txt”); // line n1 Assume the courses.txt is accessible. Which code fragment can be inserted at line n1 to enable the code to print the content of the courses.txt file?

Given: 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 code fragment: What is the result?

Given the code fragment: ZonedDateTime depart = ZonedDateTime.of(2015, 1, 15, 3, 0, 0, 0, ZoneID.of(“UTC- 7”)); ZonedDateTime arrive = ZonedDateTime.of(2015, 1, 15, 9, 0, 0, 0, ZoneID.of(“UTC- 5”)); long hrs = ChronoUnit.HOURS.between(depart, arrive); //line n1 System.out.println(“Travel time is” + hrs + “hours”); What is the result?

Given the code fragment: List values = Arrays.asList (1, 2, 3); values.stream () .map(n -> n*2) //line n1 .p eek(System.out::print) //line n2 .count(); What is the result?

Given: and the code fragment: What is the result?

Given: class Worker extends Thread { CyclicBarrier cb; public Worker(CyclicBarrier cb) { this.cb = cb; } public void run () { try { cb.await(); System.out.println(“Worker…”); } catch (Exception ex) { } } } class Master implements Runnable { //line n1 public void run () { System.out.println(“Master…”); } } and the code fragment: Master master = new Master(); //line n2 Worker worker = new Worker(cb); worker.start(); You have been asked to ensure that the run methods of both the Worker and Master classes are e

Given: IntStream stream = IntStream.of (1,2,3); IntFunction inFu= x -> y -> x*y; //line n1 IntStream newStream = stream.map(inFu.apply(10)); //line n2 newStream.forEach(System.output::print); Which modification enables the code fragment to compile?

Given the code fragment: What is the result?

Which two methods from the java.util.stream.Stream interface perform a reduction operation? (Choose two.)

Given the code fragment: What is the result?

Which statement is true about java.time.Duration?

Given the code fragment: public void recDelete (String dirName) throws IOException { File [ ] listOfFiles = new File (dirName) .listFiles(); if (listOfFiles ! = null && listOfFiles.length >0) { for (File aFile : listOfFiles) { if (aFile.isDirectory ()) { recDelete (aFile.getAbsolutePath ()); } else { if (aFile.getName ().endsWith (“.class”)) aFile.delete (); } } } } Assume that Projects contains subdirectories that contain .class files and is passed as an argument to the recDelete () method when it is invok

Given: public interface Moveable { public default void walk (Integer distance) {System.out.println(“Walking”);) public void run(Integer distance); } Which statement is true?

Which two statements are true about synchronization and locks? (Choose two.)

Given the code fragment: Path path1 = Paths.get(“/app/./sys/”); Path res1 = path1.resolve(“log”); Path path2 = Paths.get(“/server/exe/”); Path res1 = path1.resolve(“/readme/”); System.out.println(res1); System.out.println(res2); What is the result?

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

Which two statements are true about the Fork/Join Framework? (Choose two.)