Question

QUESTION 13

1. A constructor is the same as any other method definition EXCEPT for what?

   		A constructor includes an optional argument list.
   		A constructor includes an optional access modifier, usually public.
   		A constructor includes a return type.
   		A constructor places arguments within parentheses ().

2 points   

QUESTION 14

1. Using the asterisk wildcard (e.g. import com.packageName.*) will include all of the classes within packageName, even if they aren’t used.

   True

   False

2 points   

QUESTION 15

1. The Random class gives access to a floating-point number between 1 and 100.

   True

   False

2 points   

QUESTION 16

1. Which line in the following code does NOT include an error?
   
   0 public int foo() {
   1 super.onDraw(canvas);
   2 Paint dotPaint = new Paint();
   3 dotPaint.setColor(Color.RED);
   4 doble i = 1;
   5 j = 2;
   6 i = j * i;
   7 j = Math.pow(i, j);
   8 canvas.drawText(“i: “ + i + “|j: “ + j);
   9 }

   		Line 4
   		Line 5
   		Line 7
   		Line 8

2 points   

QUESTION 17

1. How do you tag objects for garbage collection?

   		Pass the object reference to a built-in garbage collection method.
   		Set the object references to null.
   		Both A and B
   		Neither A nor B

2 points   

QUESTION 18

1. The schedule method of the Timer class can take any function as its first parameter.

   True

   False

2 points   

QUESTION 19

1. What interface is included in the following code?
   
   public class DotSmasherCanvas extends View implements OnTouchListener {
      int dotX, dotY, score;
      //Other code here
   }

   		class DotSmasherCanvas
   		class View
   		class OnTouchListener
   		class int

2 points   

QUESTION 20

1. How are the properties of each component stored?

   		Class instance variables and their values in Java
   		Comma separated values in a plain text file.
   		Key/value pairs called attributes in JSON
   		Key/value pairs called attributes in XML

Answer 1

Question 13.

A constructor is the same as any other method definition except - A constructor includes an optional access modifier, usually public.

Question 14. TRUE

Question 15. FALSE

Question 16. Line 8: j = Math.pow(i, j);

Question 17. Both A and B

Question 18. FALSE

Explanation: Syntax for schedule method is: public void schedule(TimerTask timerTask, int initialDelay, int periodicDelay);

The 1st parameter is an object of a TimerTask class that needs to be repeated at regular interval. So, the 1st parameter should always be an object of the TimerTask class, and not just any function!

Question 19. class onTouchListener is the interface used in the code.

Question 20. Can be either through class instance variables and their values in Java OR Key/value pairs called attributes in XML