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1z0-809 PDF DEMO:QUESTION NO: 1 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()); } 30. } Which modification enables the code to print Try again? A. Replace line 27 with:throw e; B. Comment the lines 28, 29 and 30. C. Replace line 26 with:} catch (ArithmeticException | NumberFormatException e) { D. Replace line 26 with:} catch (Exception | ArithmeticException | NumberFormatException e) { Answer: C
QUESTION NO: 2 Given that course.txt is accessible and contains: Course : : Java and given the code fragment: public static void main (String[ ] args) { int i; char c; try (FileInputStream fis = new FileInputStream ("course.txt"); InputStreamReader isr = new InputStreamReader(fis);) { while (isr.ready()) { //line n1 isr.skip(2); i = isr.read (); c = (char) i; System.out.print(c); } } catch (Exception e) { e.printStackTrace(); } } What is the result? A. ueJa B. The program prints nothing. C. ur :: va D. A compilation error occurs at line n1. Answer: A
QUESTION NO: 3 Given the code fragments: class Employee { Optional<Address> address; Employee (Optional<Address> address) { this.address = address; } public Optional<Address> getAddress() { return address; } } class Address { String city = "New York"; public String getCity { return city: } public String toString() { return city; } } and Address address = null; Optional<Address> addrs1 = Optional.ofNullable (address); Employee e1 = new Employee (addrs1); String eAddress = (addrs1.isPresent()) ? addrs1.get().getCity() : "City Not available"; What is the result? A. City Not available B. null C. New York D. A NoSuchElementException is thrown at run time. Answer: A
QUESTION NO: 4 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.id = = b.id) { 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? A. The program prints true. B. A compilation error occurs. To ensure successful compilation, replace line n2 with:System.out.println (b1.equals((Object) b2)); C. A compilation error occurs. To ensure successful compilation, replace line n1 with:boolean equals (Book obj) { D. The program prints false. Answer: D
QUESTION NO: 5 Given that /green.txt and /colors/yellow.txt are accessible, and the code fragment: Path source = Paths.get("/green.txt); Path target = Paths.get("/colors/yellow.txt); Files.move(source, target, StandardCopyOption.ATOMIC_MOVE); Files.delete(source); Which statement is true? A. A FileAlreadyExistsException is thrown at runtime. B. The file green.txt is moved to the /colors directory. C. The yellow.txt file content is replaced by the green.txt file content and an exception is thrown. D. The green.txt file content is replaced by the yellow.txt file content and the yellow.txt file is deleted. Answer: A
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Updated: May 28, 2022
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