public&ensp;class&ensp;SwitchTest&ensp...

单项选择题 public class SwitchTest {
public static void main （String args） {
System.out.PrintIn（“value =” +switchIt（4））；
}
public static int switchIt（int x） {
int j = 1；
switch （x） {
case 1： j++；
case 2： j++；
case 3： j++；
case 4： j++；
case 5： j++；
default：j++；
}
return j + x；
}
}
What is the output from line 3？（）

A. Value = 3
B. Value = 4
C. Value = 5
D. Value = 6
E. Value = 7
F. Value = 8

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1.单项选择题 public class ExceptionTest {
class TestException extends Exception {}
public void runTest （） throws TestException {}
public void test （） /* Point X*/ {
runTest （）；
}
}
At point X on line 4， which code can be added to make the code compile？（）

A. Throws Exception.
B. Catch （Exception e）.
C. Throws RuntimeException.
D. Catch （TestException e）.
E. No code is necessary.

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2.多项选择题Which two create an instance of an array？（）

A. int ia = new int [15]；
B. float fa = new float [20]；
C. char ca = “Some String”；
D. Object oa = new float[20]；
E. Int ia = （4， 5， 6）（1， 2， 3）

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3.单项选择题 public class Test {
public static void main （String args） {
class Foo {
public int i = 3；
}
Object o = （Object） new Foo（）；
Foo foo = （Foo）o；
System.out.printIn（foo. i）；
}
}
What is the result？（）

A. Compilation will fail.
B. Compilation will succeed and the program will print “3”
C. Compilation will succeed but the program will throw a ClassCastException at line 6.
D. Compilation will succeed but the program will throw a ClassCastException at line 7.

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4.多项选择题Which two declarations prevent the overriding of a method？（）

A. Final void methoda（）{}
B. Void final methoda（）{}
C. Static void methoda（）{}
D. Static final void methoda（）{}
E. Final abstract void methoda（）{}

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5.多项选择题 public class OuterClass {
private double d1 1.0；
//insert code here
}
You need to insert an inner class declaration at line2. Which two inner class declarations are valid？（）

A. static class InnerOne { public double methoda（） {return d1；} }
B. static class InnerOne { static double methoda（） {return d1；} }
C. private class InnerOne { public double methoda（） {return d1；} }
D. protected class InnerOne { static double methoda（） {return d1；} }
E. public abstract class InnerOne { public abstract double methoda（）； }

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6.单项选择题You want a class to have access to members of another class in the same package. Which is the most restrictive access modifier that will accomplish that will accomplish this objective？（）

A. Public
B. Private
C. Protected
D. Transient
E. No access modifier is required.

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7.单项选择题How can you create a listener class that receives events when the mouse is moved？（）

A. By extending MouseListener.
B. By implementing MouseListener.
C. By extending MouseMotionListener.
D. By implementing MouseMotionListener.
E. Either by extending MouseMotionListener or extending MouseListener.
F. Either by implementing MouseMotion Listener or implementing MouseListener.

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8.多项选择题 import java.awt.*；
public class X extends Frame {
public static void main （String args） {
X x = new X（）；
x.pack（）；
x.setVisible（true）；
}
public X（） {
setLayout （new BordrLayout（））；
Panel p = new Panel （）；
add（p， BorderLayout.NORTH）；
Button b = new Button （“North”）；
p.add（b）：
Button b = new Button （“South”）；
add（b1， BorderLayout.SOUTH）：
}
}
Which two statements are true？（）

A. The buttons labeled “North” and “South” will have the same width.
B. The buttons labeled “North” and “South” will have the same height.
C. The height of the button labeled “North” can very if the Frame is resized.
D. The height of the button labeled “South” can very if the Frame is resized.
E. The width of the button labeled “North” is constant even if the Frame is resized.
F. The width of the button labeled “South” is constant even if the Frame is resized.

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9.单项选择题Which type of event indicates a key pressed on a java.awt.Component？（）

A. KeyEvent
B. KeyDownEvent
C. KeyPressEvent
D. KeyTypedEvent
E. KeyPressedEvent

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10.单项选择题Which will declare a method that is available to all members of the same package and can be referenced without an instance of the class？（）

A. Abstract public void methoda（）；
B. Public abstract double methoda（）；
C. Static void methoda（double d1）{}
D. Public native double methoda（）{}
E. Protected void methoda（double d1）{}

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