• I, II, and III

• II only

• II and III only

• I and III only

• In Java, a(n) _____ is an instance of a(n) _____.

  • object, primitive type

  • class, primitive type

  • class, object

  • object, class

• In Java, instance fields and methods of an object can be accessed with which of the following operators?

  • ( )

  • new

  • [ ]

  • .

• Consider the following Java program segment.

String s1 = new String("ABC");

String s2 = new String("ABC");

Boolean b1 = (s1 == s2);

s2 = new String("XYZ");

s1 = s2;

Boolean b2 = (s1 == s2);

At the end of execution of the segment, the value of b1 will be _____ and the value of b2 will be _____.

• true, false

• false, false

• true, true

• false, true

• Consider the following Java program segment.

String s1 = new String("ABC");

String s2 = new String("ABC");

Boolean b1 = (s1 == s2);

Boolean b2 = s1.equals(s2);

At the end of execution of the segment, the value of b1 will be _____ and the value of b2 will be _____.

• true, false

• false, false

• true, true

• false, true

• When comparing for equality in Java, primitives are compared with the operator _____, and objects are compared with the operator _____.

  • .equals, ==

  • ==, =

  • =, ==

  • ==, .equals

• In Java, which of the following modifiers indicates that a field cannot be accessed from outside its class?

  • static

  • final

  • public

  • private

• Consider the following Java program segment.

public class Foo {

public static int x;

}

If two separate Foo objects are instantiated, x is created in memory _____ time(s) because it is a _____ variable.

• one, instance

• two, class

• two, instance

• one, class

• In Java, class variables must be declared with which of the following modifiers?

  • class

  • final

  • public

  • static

• Which of the following is (are) true of static class variables in Java?

• They can be accessed regardless of whether or not a class object has been instantiated.

• They must be initialized with constructors.

• II only

• I and II

• None

• I only

• In Java, which of the following is (are) true of constructors?

• Only one constructor may be present in each class.

• A constructor must have the same name as its class.

• Argument lists can be passed to constructors.

• I, II, and III

• I and III only

• II only

• II and III only

• Consider the following Java program segment.

class Foo {

private int x = 1;

public Foo() {x = 2;}

public Foo(int xVal) {x = xVal;}

}

Foo f = new Foo();

What will be the value of f.x at the end of execution of the segment?

• 1

• 0

• null

• 2

• Which of the following is (are) true of static methods in Java?

• They can access non-static variables in their class.

• They must be associated with an instantiated object.

• I and II

• II only

• I only

• None

• Which of the following is an example of a method return-type in Java?

  • static

  • final

  • private

  • void

• Which of the following Java method declarations does not require that the method return a value?

  • private int myMethod();

  • public String myMethod();

  • private static int myMethod();

  • public void myMethod();

• In Java, defining more than one method having the same name within a particular class is called

  • sharing

  • overriding

  • superseding

  • overloading

• Of the following names, which best follows the Java naming convention for a read accessor for variable myVal?

  • getmyVal()

  • getmyval()

  • myVal()

  • getMyVal()

• Which of the following Java program segments will compile and execute without error?

• int[] numbers = {1, 2, 3};

• for (int i = 0; i < numbers.length; i++) {

• System.out.println(numbers[i]);

• }

• int[] numbers = {1, 2, 3};

• for (int i = 0; i < numbers.length; i--) {

• System.out.println(numbers[i]);

• }