华为公司Java面试题

第一部分:选择题
QUESTION NO: 1
1、public class TestI
public static void changeStr (String str) {
str=" we lcome '
}
public static void main(String[] args) {
String str='1234':
changeStr (str) :
}
Please write the output result : we Icome


QUESTION N0:2
1. public class Test {
2. static boolean foo (char c) {
3.
4. return true:
5. }
6. public static void main( String[] argv ) {
7. int i =0:
8. for ( foo('A'): foo('B')&&(i<2): foo('C')){
9. i++ :
10. foo('D'):
12. }
13. }
14. }
What is the result?   A
A. ABDCBDCB
B. ABCDABCD
C. Compilation fails.
D. An exception is thrown at runt ime.


QUESTION NO: 3
1. class A {
2. protected int method1(int a. int b) { return 0: }
3. }
Which two are valid in a class that extends class A? (Choose two) b
A public int method1(int a. int b) { return 0: }
B. private int method1(int a. int b) { return 0: }
C. private int method1(int a. long b) { return 0; ]
D. public short method1(int a. int b) { return 0; }
E. statio protected int method1(int a. int b) { return 0: }


QUESTION NO: 4   d
1. publio class Outer {
2. publio void someOuterMethod0 {
3. }
5. public class Inner {}
6. public static void main( String[]argv ) { .
7. Outer o = new Outer0:
8. }
10. }
Which instantiates an instance of Inner?
A new Inner(): new Inner(): 8
new (): new (): ew Inner ()


QUESTION NO: 5
Which method is used by a servlet to place its session ID in a URL th
at is written to the servlet’ s response output str eam?    d
A. The encodeURL method of the HttpServ letRequest interface.
B. The encodeURL method of the HttpServI etResponse inter face.
C. The rewr iteURL method of the HttpServletRequest inter face.
D. The rewr iteURL method of the HttpServletResponse inter face.


QUESTION NO: 6
Which two are equivalent? (Choose two)
A. <%= %
B. <%= ()%>
G. <%= ('size')%>
D.
E.
F.
G.

QUESTION NO: 7
Which of the following statements regarding the lifecycle of a session bean are correct?

1.is thrown if 0 is invoked when a stateful session bean instanc .e is pass ivated.

2.() does not throw an exception when a session bean with bean-managed transact ion demarcation is act ivated.

3.An exception is not thrown when 0 is called in the afterBegin nethod of a bean with conta iner -managed tr ansact ions.

4. JNDI access to java:comp/env is permitted in all the SessionSynchronization methods of a stateful session bean with conta iner managedtr. ansact ion demar cat ion.

5.Accessing resource managers in the method of a stateful sess ionbean with bean managed tr ansaction does not throw an except ion.



第二部分:概念题
1. 描述Struts体系结构?对应各个部分的开发工作主要包括哪些?


2. XML包括哪些解释技术，区别是什么?


3.JSP有哪些内置对象和动作?它们的作用分别是什么?


4、SQL问答题
SELECT * FROM TABLE

和

SELECT * FROM TABLE

WHERE NAME LIKE '%' AND ADDR LIKE '%'

AND (1_ ADDR LIKE '%' OR 2_ _ADDR LIKE‘%'

OR 3. _ADDR LIKE‘%%’ OR 4_ _ADDR LIKE '%' )

的检索结果为何不同?



5、SQL问答题
表结构:
1、表名: g. cardapply

字段(字段名/类型/长度) :

g _applyno    varchar    8; //申请单号(关键字)
g_ applydate  bigint     8; //申请日期
g_ state      var char   2; //申请状态

2、表名: g. cardapp lydetail
字段(字段名/类型/长度) :
g _applyno    varchar    8; //申请单号(关键字)

g_ name       varchar    30; //申请人姓名 

g_ idcard     var char   18; //申请人身份证号

g_ state      var char   2; //申请状态

其中，两个表的关联字段为申请单号。.

题目:
1、查询身份证号码为0103082的申请日期  

Select g_ applydate from g_ cardapply where g_ i dcarda=0103082

2、查询同一个身份证号码有两条以上记录的身份证号码及记录个数

3、将身份证号码为0103082的记录在两个表中的申请状态均改为07

4、删除g _cardapp lydetail表中所有姓李的记录