Oracle 1z0-809 Exam Dumps

Given:class Student {String course, name, city;public Student (String name, String course, String city) {this.course = course; this.name = name; this.city = city;}public String toString() {return course + “:” + name + “:” + city;}public String getCourse() {return course;}public String getName() {return name;}public String getCity() {return city;}and the code fragment:List<Student> stds = Arrays.asList(new Student (“Jessy”, “Java ME”, “Chicago”),new Student (“Helen”, “Java EE”, “Houston”),new Student (“Mark”, “Java ME”, “Chicago”));stds.stream().collect(Collectors.groupingBy(Student::getCourse)).forEach(src, res) -> System.out.println(res));What is the result?

Given:public class Canvas implements Drawable {public void draw () { }}public abstract class Board extends Canvas { }public class Paper extends Canvas {protected void draw (int color) { }}public class Frame extends Canvas implements Drawable {public void resize () { }}public interface Drawable {public abstract void draw ();}Which statement is true?

Given the code fragment:LocalDate valentinesDay =LocalDate.of(2015, Month.FEBRUARY, 14);LocalDate next15days = valentinesDay.plusDays (15);LocalDate nextYear = next15days.plusYears(1); // line n1System.out.println(nextYear);What is the result?

Given the code fragment:UnaryOperator<Integer> uo1 = s -> s*2;line n1List<Double> loanValues = Arrays.asList(1000.0, 2000.0);loanValues.stream().filter(lv -> lv >= 1500)map(lv -> uo1.apply(lv)).forEach(s -> System.out.print(s + “ “));What is the result?

Given the code fragment:Path file = Paths.get (“courses.txt”);// line n1Assume the courses.txt is accessible.Which code fragment can be inserted at line n1 to enable the code to print the content ofthe courses.txt file?

Given the code fragment:List<String> str = Arrays.asList (“my”, “pen”, “is”, “your’, “pen”);Predicate<String> test = s -> {int i = 0;boolean result = s.contains (“pen”);System.out.print(i++) + “:”);return result;};str.stream().filter(test).findFirst().ifPresent(System.out ::print);What is the result?

Given:class CheckClass {public static int checkValue (String s1, String s2) {return s1 length() – s2.length();}and the code fragment:String[] strArray = new String [] {“Tiger”, “Rat”, “Cat”, “Lion”}//line n1for (String s : strArray) {System.out.print (s + “ “);}Which code fragment should be inserted at line n1 to enable the code to print Rat Cat LionTiger?

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

Given the code fragments:interface CourseFilter extends Predicate<String> {public default boolean test (String str) {return str.equals (“Java”);}}andList<String> strs = Arrays.asList(“Java”, “Java EE”, “Java ME”);Predicate<String> cf1 = s - > s.length() > 3;Predicate cf2 = new CourseFilter() { //line n1public boolean test (String s) {return s.contains (“Java”);}};long c = strs.stream().filter(cf1).filter(cf2//line n2.count();System.out.println(c);What is the result?

Given the code fragment:List<String> empDetails = Arrays.asList(“100, Robin, HR”, “200, Mary,AdminServices”,“101, Peter, HR”);empDetails.stream().filter(s-> s.contains(“r”)).sorted().forEach(System.out::println); //line n1What is the result?

Given the structure of the STUDENT table:Student (id INTEGER, name VARCHAR)Given:public class Test {static Connection newConnection =null;public static Connection get DBConnection () throws SQLException {try (Connection con = DriveManager.getConnection(URL, username, password)) {newConnection = con;}return newConnection;}public static void main (String [] args) throws SQLException {get DBConnection ();Statement st = newConnection.createStatement();st.executeUpdate(“INSERT INTO student VALUES (102, ‘Kelvin’)”);}}Assume that:The required database driver is configured in the classpath.The appropriate database is accessible with the URL, userName, and passWord exists.The SQL query is valid.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 n1boolean 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 n2Which statement is true?

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:public class Product {int id; int price;public Product (int id, int price) {this.id = id;this.price = price;}Public String toString () { return id + “:” + price;)}and the code fragment:List<Product> products = new ArrayList <> (Arrays.asList(new Product(1, 10),new Product (2, 30),new Product (3, 20));Product p = products.stream().reduce(new Product (4, 0), (p1, p2) -> {p1.price+=p2.price;return new Product (p1.id, p1.price);});products.add(p);products.stream().parallel()reduce((p1, p2) - > p1.price > p2.price ? p1 : p2).ifPresent(System.out: :println);What is the result?

Given:public class Test<T> {private T t;public T get () {return t;}public void set (T t) {this.t = t;}public static void main (String args [ ] ) {Test<String> type = new Test<>();Test type 1 = new Test ();//line n1type.set(“Java”);type1.set(100);//line n2System.out.print(type.get() + “ “ + type1.get());}}What is the result?

Which two statements are true about localizing an application? (Choose two.)

Given:class Student {String course, name, city;public Student (String name, String course, String city) {this.course = course; this.name = name; this.city = city;}public String toString() {return course + “:” + name + “:” + city;}public String getCourse() {return course;}public String getName() {return name;}public String getCity() {return city;}and the code fragment:List<Student> stds = Arrays.asList(new Student (“Jessy”, “Java ME”, “Chicago”),new Student (“Helen”, “Java EE”, “Houston”),new Student (“Mark”, “Java ME”, “Chicago”));stds.stream().collect(Collectors.groupingBy(Student::getCourse))forEach(src, res) -> System.out.println(scr));What is the result?

Given the code fragments:interface CourseFilter extends Predicate<String> {public default boolean test (String str) {return str.contains (“Java”);}}andList<String> strs = Arrays.asList(“Java”, “Java EE”, “Embedded Java”);Predicate<String> cf1 = s - > s.length() > 3;Predicate cf2 = new CourseFilter() { //line n1public 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:List<Integer> codes = Arrays.asList (10, 20);UnaryOperator<Double> uo = s -> s +10.0;codes.replaceAll(uo);codes.forEach(c -> System.out.println(c));What is the result?

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 anargument to the recDelete () method when it is invoked.What is the result?

You want to create a singleton class by using the Singleton design pattern.Which two statements enforce the singleton nature of the design? (Choose two.)

Given:class RateOfInterest {public static void main (String[] args) {int rateOfInterest = 0;String accountType = “LOAN”;switch (accountType) {case “RD”;rateOfInterest = 5;break;case “FD”;rateOfInterest = 10;break;default:assert false: “No interest for this account”; //line n1}System.out.println (“Rate of interest:” + rateOfInterest);}}and the command:java –ea RateOfInterestWhat is the result?

Which code fragment is required to load a JDBC 3.0 driver?

Given the code fragments:class ThreadRunner implements Runnable {public void run () { System.out.print (“Runnable”) ; }}class ThreadCaller implements Callable {Public String call () throws Exception {return “Callable”; )}andExecutorService es = Executors.newCachedThreadPool ();Runnable r1 = new ThreadRunner ();Callable c1 = new ThreadCaller ();// line n1es.shutdown();Which code fragment can be inserted at line n1 to start r1 and c1 threads?

Given:class Vehicle implements Comparable<Vehicle>{int vno;String name;public Vehicle (int vno, String name) {this.vno = vno,;this.name = name;}public String toString () {return vno + “:” + name;}public int compareTo(Vehicle o) {return this.name.compareTo(o.name);}and this code fragment:Set<Vehicle> vehicles = new TreeSet <> ();vehicles.add(new Vehicle (10123, “Ford”));vehicles.add(new Vehicle (10124, “BMW”));System.out.println(vehicles);What is the result?