1Z0-851 Exam Questions

Given: 11. class X { public void foo() { System.out.print("X "); } } 12. 13. public class SubB extends X { 14. public void foo() throws RuntimeException { 15. super.foo(); 16. if (...

A company has a business application that provides its users with many different reports: receivables reports, payables reports, revenue projects, and so on. The company has just p...

Given: class Employee { String name; double baseSalary; Employee(String name, double baseSalary) { this.name = name; this.baseSalary = baseSalary; } } 09. public class SalesPerson...

A team of programmers is reviewing a proposed API for a new utility class. After some discussion, they realize that they can reduce the number of methods in the API without losing...

Given: 05. class Building { } 06. public class Barn extends Building { 07. public static void main(String[] args) { 08. Building build1 = new Building(); 09. Barn barn1 = new Barn(...

Given: public class TestOne { public static void main (String[] args) throws Exception { Thread.sleep(3000); System.out.println("sleep"); } } What is the result?

Which two statements are true? (Choose two.)

Given classes defined in two different files: package util; public class BitUtils { public static void process(byte[] b) { /* more code here */ } } 1. package app; 2. 3. public cla...

Given: class Snoochy { Boochy booch; public Snoochy() { booch = new Boochy(this); } } class Boochy { Snoochy snooch; public Boochy(Snoochy s) { snooch = s; } } And the statements:...

Given: public class Batman { int squares = 81; public static void main(String[] args) { new Batman().go(); } void go() { incr(++squares); System.out.println(squares); } void incr(i...

Click the Exhibit button. What is the output of the program shown in the exhibit?

Given the following directory structure: bigProject |--source | |--Utils.java | |--classes |-- And the following command line invocation: javac -d classes source/Utils.java Assume...

Given: interface Fish { } class Perch implements Fish { } class Walleye extends Perch { } class Bluegill { } public class Fisherman { public static void main(String[] args) { Fish...

Given: 11. public void testIfA() { 12. if (testIfB("True")) { 13. System.out.println("True"); 14. } else { 15. System.out.println("Not true"); 16. } 17. } 18. public Boolean testIf...

Given: 31. //some code here line 31 32. try { 33. //some code here line 33 34. } catch (NullPointerException e1) { 35. //some code here line 35 36. } finally { 37. //some code here...

Given: 10. interface Foo {} 11. class Alpha implements Foo {} 12. class Beta extends Alpha {} 13. class Delta extends Beta { 14. public static void main( String[] args ) { 15. Beta...

Given: 33. try { 34. //some code here 35. } catch (NullPointerException e1) { 36. System.out.print("a"); 37. } catch (Exception e2) { 38. System.out.print("b"); 39. } finally { 40....

Given: 1. public class Test { 2. public enum Dogs {collie, harrier, shepherd}; 3. public static void main(String [] args) { 4. Dogs myDog = Dogs.shepherd; 5. switch (myDog) { 6. ca...

Click the Exhibit button. Given: ClassA a = new ClassA(); a.methodA(); What is the result?

Given: 09. class Line { 10. public static class Point {} 11. } 12. 13. class Triangle { 14. public Triangle(){ 15. // insert code here 16. } 17. } Which code, inserted at line 15,...

Given: 10. class Nav{ 11. public enum Direction { NORTH, SOUTH, EAST, WEST } 12. } 13. public class Sprite{ 14. // insert code here 15. } Which code, inserted at line 14, allows th...

Given: interface Data { public void load(); } abstract class Info { public abstract void load(); } Which class correctly uses the Data interface and Info class?

Given: 11. public class Rainbow { 12. public enum MyColor { 13. RED(0xff0000), GREEN(0x00ff00), BLUE(0x0000ff); 14. private final int rgb; 15. MyColor(int rgb) { this.rgb = rgb; }...

Given: 3. import java.util.*; 4. public class G1 { 5. public void takeList(List<? extends String> list) { 6. // insert code here 7. } 8. } Which three code fragments, inserted inde...

Given: 09. class One { 10. void foo() { } 11. } 12. 13. class Two extends One { 14. //insert method here 15. } Which three methods, inserted individually at line 14, will correctly...

Given: public interface A { public void m1(); } class B implements A { } class C implements A { public void m1() { } } class D implements A { public void m1(int x) { } } abstract c...

Click the Exhibit button. What is the result?

Given: NumberFormat nf = NumberFormat.getInstance(); nf.setMaximumFractionDigits(4); nf.setMinimumFractionDigits(2); String a = nf.format(3.1415926); String b = nf.format(2); Which...

Given: 11. String test = "a1b2c3"; 12. String[] tokens = test.split("\\d"); 13. for(String s: tokens) System.out.print(s + " "); What is the result?

Given: public class Person { private String name, comment; private int age; public Person(String n, int a, String c) { name = n; age = a; comment = c; } public boolean equals(Objec...

Given: String csv = "Sue,5,true,3"; Scanner scanner = new Scanner( csv ); scanner.useDelimiter(","); int age = scanner.nextInt(); What is the result?

Given: import java.util.*; public class WrappedString { private String s; public WrappedString(String s) { this.s = s; } public static void main(String[] args) { HashSet<Object> hs...

Given a class whose instances, when found in a collection of objects, are sorted by using the compareTo() method, which two statements are true? (Choose two.)

Given: 01. import java.util.*; 02. public class Example { 03. public static void main(String[] args) { 04. // insert code here 05. set.add(new Integer(2)); 06. set.add(new Integer(...

Given: 01. class TestException extends Exception { } 02. class A { 03. public String sayHello(String name) throws TestException { 04. if(name == null) throw new TestException(); 05...

Given: public class Breaker { static String o = ""; public static void main(String[] args) { z: o = o + 2; for(int x = 3; x < 8; x++) { if(x==4) break; if(x==6) break z; o = o + x;...

Given: 05. class A { 06. void foo() throws Exception { throw new Exception(); } 07. } 08. class SubB2 extends A { 09. void foo() { System.out.println("B "); } 10. } 11. class Teste...

Given: 1. public class Mule { 2. public static void main(String[] args) { 3. boolean assert = true; 4. if(assert) { 5. System.out.println("assert is true"); 6. } 7. } 8. } Which co...

Given: public class Boxer1{ Integer i; int x; public Boxer1(int y) { x = i+y; System.out.println(x); } public static void main(String[] args) { new Boxer1(new Integer(4)); } } What...

Given: 11. public static void main(String[] args) { 12. Integer i = new Integer(1) + new Integer(2); 13. switch(i) { 14. case 3: System.out.println("three"); break; 15. default: Sy...

Given: class Money { private String country = "Canada"; public String getC() { return country; } } class Yen extends Money { public String getC() { return super.country; } } public...

Which three statements are true? (Choose three.)

Given: package test; class Target { public String name = "hello"; } What can directly access and change the value of the variable name?

Click the Exhibit button. What two must the programmer do to correct the compilation errors? (Choose two.) 1. public class Car { 2. private int wheelCount; 3. private String vin; 4...

A team of programmers is involved in reviewing a proposed design for a new utility class. After some discussion, they realize that the current design allows other classes to access...

Given: class Thingy { Meter m = new Meter(); } class Component { void go() { System.out.print("c"); } } class Meter extends Component { void go() { System.out.print("m"); } } class...

Given: 10. interface Jumper { public void jump(); } ... 20. class Animal {} ... class Dog extends Animal { Tail tail; 32. } ... class Beagle extends Dog implements Jumper{ public v...

Click the Exhibit button. What is the result?

Given a valid DateFormat object named df, and 16. Date d = new Date(0L); 17. String ds = "December 15, 2004"; 18. //insert code here What updates d's value with the date represente...

Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object? (Choose two.)