QUESTION 11

Consider the following Java code fragment. What number is printed?

int total = 0; for (int i=1; i<=5; ++i) { for (int j = 1; j <= 5; ++j) { total = total + 1; } } System.out.println(total);

4 points

QUESTION 12

Consider the following Java code fragment:

public class MyClass { public int x; public int y; }

This class is syntactically correct, but violates principles of object oriented programming. What is wrong with this class?

	a.	Fields are public rather than private
	b.	The class should be declared private class MyClass
	c.	No character coding has been specified
	d.	All of the above

4 points

QUESTION 13

Which of following pairs have an is-a relationship?

	a.	Circle and Shape
	b.	Shape and Location
	c.	Circle and Square
	d.	Circle and Location

4 points

QUESTION 14

Consider the following code fragments:

public class PhoneNumber { private int areaCode; private int prefix; private int lineNumber; // Constructor public PhoneNumber(int areaCode, int prefix, int lineNumber) { this.areaCode = areaCode; this.prefix = prefix; this.lineNumber = lineNumber; } // Accessors go here (not shown in this example) } public class InternationalPhoneNumber extends PhoneNumber{ private int countryCode; // TODO Add Constructor }

The first line of the constructor for InternationalPhoneNumber should be:

	a.	public InternationalPhoneNumber(int areaCode, int prefix, int lineNumber) {
	b.	public InternationalPhoneNumber(PhoneNumber phoneNumber, int countryCode) {
	c.	public InternationalPhoneNumber(this.all) {
	d.	public InternationalPhoneNumber(int areaCode, int prefix, int lineNumber, int countryCode) {

4 points

QUESTION 15

Look at the Java code fragment in Question 14. The second line of the constructor for InternationalPhoneNumber should contain:

	a.	super();
	b.	super(areaCode, prefix, lineNumber);
	c.	super(areaCode, prefix, lineNumber, countryCode);
	d.	super(this);

3 points

QUESTION 16

Look at the Java code fragment in Question 14. The InternationalPhoneNumber constructor must also contain:

	a.	this.countryCode = countryCode;
	b.	this.countryCode = this.countryCode;
	c.	countryCode = this.countryCode;
	d.	return(countryCode);