Jeanne Boyarsky - OCP Oracle Certified Professional Java SE 17 Developer Study Guide

5 What is the result of the following program?1: public class MathFunctions { 2: public static void addToInt(int x, int amountToAdd) { 3: x = x + amountToAdd; 4: } 5: public static void main(String[] args) { 6: var a = 15; 7: var b = 10; 8: MathFunctions.addToInt(a, b); 9: System.out.println(a); } }101525Compiler error on line 3Compiler error on line 8None of the above

6 Suppose that we have the following property files and code. What values are printed on lines 8 and 9, respectively?Penguin.properties name=Billy age=1 Penguin_de.properties name=Chilly age=4 Penguin_en.properties name=Willy 5: Locale fr = new Locale("fr"); 6: Locale.setDefault(new Locale("en", "US")); 7: var b = ResourceBundle.getBundle("Penguin", fr); 8: System.out.println(b.getString("name")); 9: System.out.println(b.getString("age"));Billy and 1Billy and nullWilly and 1Willy and nullChilly and nullThe code does not compile.

7 What is guaranteed to be printed by the following code? (Choose all that apply.)int[] array = {6,9,8}; System.out.println("B" + Arrays.binarySearch(array,9)); System.out.println("C" + Arrays.compare(array, new int[] {6, 9, 8})); System.out.println("M" + Arrays.mismatch(array, new int[] {6, 9, 8}));B1B2C-1C0M-1M0The code does not compile.

8 Which functional interfaces complete the following code, presuming variable r exists? (Choose all that apply.)6: ______ x = r.negate(); 7: ______ y = () -> System.out.println(); 8: ______ z = (a, b) -> a - b;BinaryPredicateComparableComparatorConsumerPredicateRunnableRunnable

9 Suppose you have a module named com.vet. Where could you place the following module-info.java file to create a valid module?public module com.vet { exports com.vet; }At the same level as the com folderAt the same level as the vet folderInside the vet folderNone of the above

10 What is the output of the following program? (Choose all that apply.)1: interface HasTail { private int getTailLength(); } 2: abstract class Puma implements HasTail { 3: String getTailLength() { return "4"; } 4: } 5: public class Cougar implements HasTail { 6: public static void main(String[] args) { 7: var puma = new Puma() {}; 8: System.out.println(puma.getTailLength()); 9: } 10: public int getTailLength(int length) { return 2; } 11: }24The code will not compile because of line 1.The code will not compile because of line 3.The code will not compile because of line 5.The code will not compile because of line 7.The code will not compile because of line 10.The output cannot be determined from the code provided.

11 Which lines in Tadpole.java give a compiler error? (Choose all that apply.)// Frog.java 1: package animal; 2: public class Frog { 3: protected void ribbit() { } 4: void jump() { } 5: } // Tadpole.java 1: package other; 2: import animal.*; 3: public class Tadpole extends Frog { 4: public static void main(String[] args) { 5: Tadpole t = new Tadpole(); 6: t.ribbit(); 7: t.jump(); 8: Frog f = new Tadpole(); 9: f.ribbit(); 10: f.jump(); 11: } }Line 5Line 6Line 7Line 8Line 9Line 10All of the lines compile.

12 Which of the following can fill in the blanks in order to make this code compile?__________ a = __________.getConnection( url, userName, password); __________ b = a.prepareStatement(sql); __________ c = b.executeQuery(); if (c.next()) System.out.println(c.getString(1));Connection, Driver, PreparedStatement, ResultSetConnection, DriverManager, PreparedStatement, ResultSetConnection, DataSource, PreparedStatement, ResultSetDriver, Connection, PreparedStatement, ResultSetDriverManager, Connection, PreparedStatement, ResultSetDataSource, Connection, PreparedStatement, ResultSet

13 Which of the following statements can fill in the blank to make the code compile successfully? (Choose all that apply.)Set