Free Java SE 8 Programmer II 1Z0-809 Exam Practice Test

Given:IntStream stream = IntStream.of (1,2,3);IntFunction<Integer> inFu= x -> y -> x*y;//line n1IntStream newStream = stream.map(inFu.apply(10));//line n2newStream.forEach(System.out::print);Which modification enables the code fragment to compile?

• Replace line n1 with:IntFunction<UnaryOperator> inFu = x -> y -> x*y;
• Replace line n1 with:IntFunction<IntUnaryOperator> inFu = x -> y -> x*y;
• Replace line n1 with:BiFunction<IntUnaryOperator> inFu = x -> y -> x*y;
• Replace line n2 with:IntStream newStream = stream.map(inFu.applyAsInt (10));

Given the code fragment:public static void main (String[] args) throws IOException {BufferedReader brCopy = null;try (BufferedReader br = new BufferedReader (new FileReader(''employee.txt''))) { //line n1br.lines().forEach(c -> System.out.println(c));brCopy = br;//line n2}brCopy.ready(); //line n3;}Assume that the ready method of the BufferedReader, when called on a closed BufferedReader, throws an exception, and employee.txt is accessible and contains valid text.What is the result?

• A compilation error occurs at line n3.
• A compilation error occurs at line n1.
• A compilation error occurs at line n2.
• The code prints the content of the employee.txt file and throws an exception at line n3.

Given:class Bird {public void fly () { System.out.print(''Can fly''); }}class Penguin extends Bird {public void fly () { System.out.print(''Cannot fly''); }}and the code fragment:class Birdie {public static void main (String [ ] args) {fly( ( ) -> new Bird ( ));fly (Penguin : : new);}/* line n1 */}Which code fragment, when inserted at line n1, enables the Birdie class to compile?

• static void fly (Consumer<Bird> bird) {bird :: fly ();}
• static void fly (Consumer<? extends Bird> bird) {bird.accept( ) fly ();}
• static void fly (Supplier<Bird> bird) {bird.get( ) fly ();}
• static void fly (Supplier<? extends Bird> bird) {LOST

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

• A thread automatically acquires the intrinsic lock on a synchronized statement when executed.
• The intrinsic lock will be retained by a thread if return from a synchronized method is caused by an uncaught exception.
• A thread exclusively owns the intrinsic lock of an object between the time it acquires the lock and the time it releases it.
• A thread automatically acquires the intrinsic lock on a synchronized method's object when entering that method.
• Threads cannot acquire intrinsic locks on classes.

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?

• Rate of interest: 0
• An AssertionError is thrown.
• No interest for this account
• A compilation error occurs at line n1.

Given:class UserException extends Exception { }class AgeOutOfLimitException extends UserException { }and the code fragment:class App {public void doRegister(String name, int age)throws UserException, AgeOutOfLimitException {if (name.length () < 6) {throw new UserException ();} else if (age >= 60) {throw new AgeOutOfLimitException ();} else {System.out.println(''User is registered.'');}}public static void main(String[ ] args) throws UserException {App t = new App ();t.doRegister(''Mathew'', 60);}}What is the result?

• User is registered.
• An AgeOutOfLimitException is thrown.
• A UserException is thrown.
• A compilation error occurs in the main method.

Given the code fragments:public class Book implements Comparator<Book> {String name;double price;public Book () {}public Book(String name, double price) {this.name = name;this.price = price;}public int compare(Book b1, Book b2) {return b1.name.compareTo(b2.name);}public String toString() {return name + '':'' + price;}}andList<Book>books = Arrays.asList (new Book (''Beginning with Java'', 2), new book (''AGuide to Java Tour'', 3));Collections.sort(books, new Book());System.out.print(books);What is the result?

• [A Guide to Java Tour:3.0, Beginning with Java:2.0]
• [Beginning with Java:2, A Guide to Java Tour:3]
• A compilation error occurs because the Book class does not override the abstract method compareTo().
• An Exception is thrown at run time.

Given the code fragment:List<Double> doubles = Arrays.asList (100.12, 200.32);DoubleFunction funD = d --> d + 100.0;doubles.stream (). forEach (funD); // line n1doubles.stream(). forEach(e --> System.out.println(e)); // line n2What is the result?

• A compilation error occurs at line n2.
• 200.12300.32
• 100.12200.32
• A compilation error occurs at line n1.

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?

• 20.030.0
• 1020
• A compilation error occurs.
• A NumberFormatException is thrown at run time.

What is true about the java.sql.Statement interface?

• It provides a session with the database.
• It is used to get an instance of a Connection object by using JDBC drivers.
• It provides a cursor to fetch the resulting data.
• It provides a class for executing SQL statements and returning the results.