IT公司面试手册

1： One team tries to buy several bottle of drinks for 27 athletes. In ABC store three empty bottles can be exchanged

with one new bottle of drinks. Which of the following numbers is the minimal one that the team should buy for the 27

athletes?
A 17
B 18
C 19
D 20

2： How can you create a listener class that receives events when the mouse is moved(single Answer)
A By extending MouseListener
B By implementing MouseListener
C By extending Mouse Motion Listener
D By implementing Mouse Motion Listener
E Either by extending Mouse Motion Listener  or extending MouseListener
F Either by implementing Mouse Motion Listener  or  implementing MouseListener

3： You are assign the task of building a panel containing a TextArea at the top, a label directly below it, and a button

directly below the label. If the three components are added directly to the panel, which layout manager can be panel use to

ensure that the TextArea absorbs all of the free vertical space when the parel is resized? which layout manager can be panel use to ensure that the TextArea absorbs all of the free vertical space when the parel is resized?）

4： Which are not containers in Java?(Multiple answer)
A ScollPane
B Canvas
C Scrollbar
D Applet
E Dialog

5：You need to store elements in a collection that
guarantees that no duplicates are stored and all elements
can be access in nature order, which interface provides
that capability?
A java.uil.Map
B java.util.Collection
C java.util.List
D java.util.SortedSet
E java.util.SortedMap
F java.util.Set

6：What will happen when you attempt to compile and run this
code?

abstract class Base{
abstract public void myfunc();
public class Abs extends Base{
public static void main(String argv[])
{
Abs a = new Abs();
a.amethod();
}
public void amethod(){
System.out.println(“A method”);;
}
}

A The code will compile and run, printing out the words “A
method”
B The compiler will complain errors in Base class.

C The code will compile but complain at run time that the
Base class has none abstract methods.
D The compiler will complain errors in Abs class.

7： Description
import java.util.*;

public class Test
{
private String value = null;
public Test(String v)
{
value = v;
}
public boolean equals(Test o)
{
if(o==this) return true;
if(o instanceof Test)
{
Test test =(Test) o;
return value.equals(test.value);
}
return false;
}
public static void main(String[] args)
{
List list = new ArrayList();
Test test1 = new Test(“object”);
Test test2 = new Test(“object”);
Test test3 = new Test(“object”);
Object test4 = new Test(“object”);
list.add(test1);

System.out.println(list.contains(test2));
System.out.println(test2.equals(test3));
System.out.println(test3.equals(test4));

}
}

8：
Which of the following is NOT true regarding to RuntimeException?
A RuntimeException is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtul

Machine.
B A method is not required to declare in its throws clause any subclasses of RuntimeException that might be thrown during the

execution of the method but not caught.
C An RuntimeException is a subclass of Throwable that indicates serious problems that a reasonable application should not try

to catch.
D NullPointerException is one kind of RuntimeException.

9： Which of the following items demonstrates the key characteristics of Web 2.0?
A Centralized
B User centered design
C Open
D Light Weight

10： When using the writeObject method to store the state of n
object, how can you protect sensitive data from being
accessed in the stored object?
A Implement the Object as Exteralizable
B Declare the sensitive fields as private transisent
C Declare the sensitive fields as static transisent
D Declare the sensitive fields as protected transisent