易搜酷 esocou

题目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?（一个队伍想要买几瓶饮料给27名运动员喝。在某商店规定3个空瓶可以换1瓶饮料，那么给27名运动员如果每人喝一瓶的话，最少要买几瓶）
A 17
B 18
C 19
D 20

题目2： How can you create a listener class that receives events when the mouse is moved(single Answer)（单选：如何创建一个听者类，能做到当老鼠开始移动时，接收事件）
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

题目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?

题目4： Which are not containers in Java?(Multiple answer)（多选：下面哪几个不是java所包含的）
A ScollPane
B Canvas
C Scrollbar
D Applet
E Dialog

题目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?（你需要存储元素到某种数据结构中，而且要确保元素中在自然队列中没有重复，下面哪个接口能保证这种能力）
A java.uil.Map
B java.util.Collection
C java.util.List
D java.util.SortedSet
E java.util.SortedMap
F java.util.Set

题目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.

题目7： Description(下列程序输出结果是什么？阐述原理)
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));

}
}
题目8：
Which of the following is NOT true regarding to RuntimeException?（下面关于运行时异常说法错误的是）
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.

题目9： Which of the following items demonstrates the key characteristics of Web 2.0（Web2.0的关键字特征是什么）?
A Centralized
B User centered design
C Open
D Light Weight

题目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?（当用writeObject方法储存n个对象的状态时，如何保证敏感数据不被存储对象访问）
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（