310-019 Sun - Braindumps.com.ua: question list for "Sun Certified Associate for the Java Platform, Standard Edition", page: 9

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Sun 310-019: Sun Certified Associate for the Java Platform, Standard Edition

#81. Which three can be included in an interface declaration? (Choose three.)

#82. Given:
interface Writable { }
interface Erasable { }
Which three are valid? (Choose three.)

#83. Which is a valid definition of an interface called Transportable given another valid interface, Movable?

#84. Given:

 1. interface Movable { 
 2. void move(); 
 3. void stop(); 
 4. }

Which is valid?

#85. Given:

 11. class Automobile { 
 12. public void drive() { System.out.print("go forward "); } 
 13. } 
 14. class Ferrari extends Automobile { 
 15. public void drive () { System.out.print("go fast "); } 
 16. } 
 17. public class Driver { 
 18. public static void main(String[] args) { 
 19. Automobile[] autos = { new Automobile(), new Ferrari() }; 
 20. for (int x = 0; x < autos.length; x++) 
 21. autos[x].drive(); 
 22. } 
 23. }

What is the result?

#86. Given:

 1. interface Pet { } 
 2. class Dog implements Pet { } 
 3. class Beagle extends Dog { }

Which three are valid? (Choose three.)

#87. Given:

 3. interface Pet { 
 4. void eat(); 
 5. } 
 6. class Dog implements Pet { public void eat() { } } 
 7. class Beagle extends Dog { public void eat() { } }

Which demonstrates the "program to an interface" principle?

#88. Which is a valid abstract class?

#89. Exhibit:

 1. interface Drinkable { 
 2. void drink(); 
 3. } 
 1. class Tea implements Drinkable { 
 2. public void drink() { System.out.print("Drinking tea..."); } 
 3. } 
 1. class Coffee implements Drinkable { 
 2. public void drink() { System.out.print("Drinking coffee..."); } 
 3. } 
 1. public class TestDrink { 
 2. static boolean teaFlag; 
 3. public static Drinkable getDrinkable() { 
 4. if (teaFlag) { 
 5. return new Tea(); 
 6. } else { 
 7. return new Coffee(); 
 8. } 
 9. } 
 10. // more code that sets the value of the teaFlag boolean 
 11. } 
 1. public class DrinkableFactory { 
 2. static boolean teaFlag; 
 3. public static Drinkable getDrinkable(){ 
 4. if (teaFlag) { 
 5. return new Tea(); 
 6. } else { 
 7. return new Coffee(); 
 8. } 
 9. } 
 10. // more code that sets the value of the teaFlag boolean 
 11. }

Which, inserted at line 3 of the TestDrink class, demonstrates the "program to an interface" principle?

#90. Given:

 6. int time = 12; 
 7. if ( time < 12 ) { 
 8. System.out.println("Good morning"); 
 9. } 
 10. // insert code here 
 11. System.out.println("Good afternoon"); 
 12. } 
 13. else if ( time >= 18 ) { 
 14. System.out.println("Good evening"); 
 15. }

Which three, inserted independently at line 10, produce the output Good afternoon? (Choose three.)

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Server date 05:51 10-01-2009

Sun 310-019

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