Tag: programming languages

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Questions Related to programming languages

Multiple choice technology programming languages

Click the Exhibit button. 10. interface Foo { 11. int bar(); 12. } 13. 14. public class Beta { 15. 16. class A implements Foo { 17. public int bar() { return 1; } 18. } 19. 20. public int fubar( Foo foo) { return foo.bar(); } 21. 22. public void testFoo() { 23. 24. class A implements Foo { 25. public int bar() { return 2; } 26. } 27. 28. System.out.println( fubar( new A())); 29. } 30. 31. public static void main( String[] argv) { 32. new Beta().testFoo(); 33. } 34. } Which three statements are true? (Choose three.)

  1. The code compiles and the output is 2

  2. If lines 16, 17 and 18 were removed, the code would compile and

  3. If lines 24, 25 and 26 were removed, the code would compile and the output would be 1

  4. D. If lines 24, 25 and 26 were removed, compilation would fail
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Full explanation
Multiple choice technology programming languages

Given: 1. package sun.scjp; 2. public enum Color { RED, GREEN, BLUE } 1. package sun.beta; 2. // insert code here 3. public class Beta { 4. Color g = GREEN; 5. public static void main( String[] argv) 6. { System.out.println( GREEN); } 7. } The class Beta and the enum Color are in different packages. Which two code fragments, inserted individually at line 2 of the Beta declaration, will allow this code to compile? (Choose two.)

  1. import sun.scjp.Color.*;

  2. import sun.scjp.Color; import static sun.scjp.Color.*;

  3. import sun.scjp.Color; import static sun.scjp.Color.GREEN;

  4. import static sun.scjp.Color.*;
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Full explanation
Multiple choice technology programming languages

Given: 11. public abstract class Shape { 12. int x; 13. int y; 14. public abstract void draw(); 15. public void setAnchor(int x, int y) { 16. this.x = x; 17. this.y = y; 18. } 19. } and a class Circle that extends and fully implements the Shape class. Which is correct?

  1. Shape s = new Shape(); s.setAnchor(10,10); s.draw();

  2. Circle c = new Shape(); c.setAnchor(10,10); c.draw();

  3. Shape s = new Circle(); s.setAnchor(10,10); s.draw();

  4. Shape s = new Circle(); s->setAnchor(10,10); s->draw();
Reveal answer Fill a bubble to check yourself
C Correct answer
Full explanation
Multiple choice technology programming languages

Given: 10. abstract public class Employee { 11. protected abstract double getSalesAmount(); 12. public double getCommision() { 13. return getSalesAmount() * 0.15; 14. } 15. } 16. class Sales extends Employee { 17. // insert method here 18. } Which two methods, inserted independently at line 17, correctly complete the Sales class? (Choose two.)

  1. A. double getSalesAmount() { return 1230.45; }

  2. B. public double getSalesAmount() { return 1230.45; }

  3. C. private double getSalesAmount() { return 1230.45; }

  4. D. protected double getSalesAmount() { return 1230.45; }
Reveal answer Fill a bubble to check yourself
B,D Correct answer
Full explanation
Multiple choice technology programming languages

Given: 10. interface Data { public void load(); } 11. abstract class Info { public abstract void load(); } Which class correctly uses the Data interface and Info class?

  1. . public class Employee extends Info implements Data { public void load() { /do something/ }

  2. public class Employee implements Info extends Data { public void load() { /do something/ }

  3. public class Employee extends Info implements Data { public void load() { /*do something */ }

  4. public class Employee implements Info extends Data { public void Data.load() { /*d something */ }
Reveal answer Fill a bubble to check yourself
A Correct answer
Full explanation
Multiple choice technology programming languages

Given: 11. public abstract class Shape { 12. private int x; 13. private int y; 14. public abstract void draw(); 15. public void setAnchor(int x, int y) { 16. this.x = x; 17. this.y = y; 18. } 19. } Which two classes use the Shape class correctly? (Choose two.)

  1. public class Circle implements Shape { private int radius;

  2. public abstract class Circle extends Shape { private int radius;

  3. public class Circle extends Shape {

  4. public abstract class Circle implements Shape {
Reveal answer Fill a bubble to check yourself
B,C Correct answer
Full explanation
Multiple choice technology programming languages

Click the Exhibit button. 1. public class GoTest { 2. public static void main(String[] args) { 3. Sente a = new Sente(); a.go(); 4. Goban b = new Goban(); b.go(); 5. Stone c = new Stone(); c.go(); 6. } 7. } 8. 9. class Sente implements Go { 10. public void go() { System.out.println(”go in Sente.”); } 11. } 12. 13. class Goban extends Sente { 14. public void go() { System.out.println(”go in Goban”); } 15. } 16. 17. class Stone extends Goban implements Go { } 18. 19. interface Go { public void go(); } What is the result?

  1. go in Goban go in Sente go in Sente

  2. go in Sente go in Sente go in Goban

  3. go in Sente go in Goban go in Goban

  4. D. go in Goban go in Goban go in Sente
Reveal answer Fill a bubble to check yourself
C Correct answer
Full explanation