1Z0-851 Real Exam Questions

Given: public class Test { public enum Dogs {collie, harrier}; public static void main(String [] args) { Dogs myDog = Dogs.collie; switch (myDog) { case collie: System.out.print("collie "); case harrier: System.out.print("harrier "); } } } What is the result?

Given: interface Fish { } class Perch implements Fish { } class Walleye extends Perch { } class Bluegill { } public class Fisherman { public static void main(String[] args) { Fish f = new Walleye(); Walleye w = new Walleye(); Bluegill b = new Bluegill(); if(f instanceof Perch) System.out.print("f-p "); if(w instanceof Fish) System.out.print("w-f "); if(b instanceof Fish) System.out.print("b-f "); } } What is the result?

Given: class ClassA { public int numberOfInstances; protected ClassA(int numberOfInstances) { this.numberOfInstances = numberOfInstances; } } public class ExtendedA extends ClassA { private ExtendedA(int numberOfInstances) { super(numberOfInstances); } public static void main(String[] args) { ExtendedA ext = new ExtendedA(420); System.out.print(ext.numberOfInstances); } } Which statement is true?

Given: 1. public class Plant { 2. private String name; 3. 4. public Plant(String name) { 5. this.name = name; 6. } 7. 8. public String getName() { 9. return name; 10. } 11.} 1. public class Tree extends Plant { 2. public void growFruit() { 3. } 4. 5. public void dropLeaves() { 6. } 7. } Which statement is true?

Given: class TestA { public void start() { System.out.println("TestA"); } } public class TestB extends TestA { public void start() { System.out.println("TestB"); } public static void main(String[] args) { ((TestA)new TestB()).start(); } } What is the result?