神州泰岳软件java笔试试题及答案

1.JAVA基础
1． Given the following code for the Demo class:
1. public class Demo {
2. private int [] count;
3. public Demo() {count = new int[10];}
4. public void setCount(int ct,int n) {count[n]=ct;}
5. public void showCount(int n) {System.out.println(“Count is:” count[n];)
6. public int getCount (int n) {return count[n];}
7. }
Question A :What would be the result of calling the showCount method with a parameter of 9 immediately after creating an instance of Demo?


Question B: Where are the bug code in the Demo class?And why?


2.Given:
1. public class X {
2. public void m(Object x) {
3. x = new Integer(99);
4. Integer y = (Integer)x;
5. y = null;
6. System.out.println(“x is:” x);
7. }
8. }
When is the Integer object created in line 3 , eligible for garbage collection?


1. public class MyTextArea extends TextArea {
2. public MyTextArea (int nrows, int ncols) {
3. enableEvents (AWTEvent .TEXT_EVENT_MASK);
4. }
5.
6. public void processTextEvent (TextEvent te) {
7. System.out.println(“Processing a text event .”);
8. }
9. }
A . The source code must appear in a file called MyTextArea.java
B . Between lines 2 and 3,a call should be made to super(nrows,ncols) so that the new component will have the corrent size.
D . At line 6,the return type of processTextEvents()should be declared
Boolean ,not void .
D . Between lines 7 and 8 ,the following code should appear : return true;
E . Between lines 7 and 8,the following code should appear : super
processTextEvent (te);
2.数据库
1.计一个用于不同职业、不同地区、不同年龄段人群收入分析的数据库模型








2．JDBC 访问数据库后得到的ResultSet 以0 还是1 开始，Vector 是从0 还是1 开始



3.网络
1、ping 使用的是哪一个协议？
A . TCP
B . ARP
C . ICMP
D . BootP
2、如下IP所在网段的有效IP地址范围是多少？
192．168．168．188．255．255．255．192
A .192.168.168.129-190
B .192.168.168.1-254
C .192.168.168.128-190
D .192.168.168.128-192
3、当一个路由器收到一个未知目的地包的时候，这台路由器将如何处理该数据包
A . 将包传递出去
B .将包丢弃
C . 保留该包，直到路由刷新
D .将该包作为广播包发出去
4、交换机处于OSI模型中的第几层？
A .数据链路层
B.物理层
C .应用层
D .传输层
5、 谈你对VLAN和WAP的认识？




4、SNMP：
1、SNMP协议有多少版本？


2、SNMP协议有多少种报文，请一一列出？


3、What happens when you try to compile and run the following application?Choose
All corrent options.
1. public class Z {
2. public static void main(String a[]) {
3. new Z();
4. }
5.
6. Z() {
7. Z alias1 = this;
8. Z alias2 = this;
9. synchronized(alias1) {
10. try {
11. alias2.wait();
12. System.out.println(“DONE WAITING”);
13. }
14. catch (InterruptedException e) {
15. System.out.println (“INTERR UPTED”);
16. }
17. catch (Exception e) {
18. System.out.println(“OTHER EXCEPTION”);
19. }
20. finally {
21. System.out.println(“FINALLY”);
22. }
23. }
24. System.out.println(“ALL DONE”);
25. }
26. }
A . The application compiles but doesn’t print anything.
B . The application compiles and print “DONE WAITING”
C . The application compiles and print “FINALLY”
D . The application compiles and print “ALL DONE”
E . The application compiles and print “INTERRUPTED”
4、 which statement or statements are true about the code listed below ?
Choose all correct options.
5、网络管理：
1 、列出你所用过或听过的网络管理软件，并谈谈你对该软件的看法？