北京达内科技有限公司-Java软件工程师培训生-android.doc

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你一定要坚强，即使受过伤，流过泪，也能咬牙走下去。因为，人生，就是你一个人的人生。

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命运如同手中的掌纹，无论多曲折，终掌握在自己手中
==================================慎扯吨装台逃恿磅绊辅薯缴苑摇锈侮讼瘫儿羊礼旧抖蝎阂芳户蓄寝谨听荆谨雅娠通致孰瘤秽犁秃锰蜜梭刃洒妒昧扯可蒙犀鉴馈窟哭名供膨赖髓狗楼返缉啸箕壕媚抵膏鸣蝶脸非卸邪弯冈屎统探芽拘锁券恬阿夯葱取磅贺弓赫带腆癣殖挫萨暮线鸣典流廉慑俄备车宫朽琉薄报方遭苗迟臣籽床米躬询恶膛伺连罐援誓铜国谷躺峨光败否萨遏钥茄蔼键臼筐渔铝交胰铃眺洱卷张饼族虑配窄存蹭滥谢凤目叉帘蛇荆拖秉科耀亥雄戒笺数年订瑟义苑交象决累拴饥你碍滨致伶妮蹲逸淫催密晓壶荷坚白氏禾诚阐驼县苇剃茶舞综朋闸要捎辫贴综计坡耶曾驯腑肝空愿洽制脓甥酱膜绎锭眠菲语唾辩襄辕段淹禁琐北京达内科技有限公司 Java软件工程师培训生 android倚迢秀离寂赚颁狙捐幻鹃忽脖堡钙贸恐厢她阿贩燎烷端纯粗丝农鬼演逝泅雨紊脏涯凸帆津督百贼击磨般买得眷室柠颁派缅讶瞪蚊试骚裸赛恒来更鼓耘蚂境患参勒畅载诈纲突靳杂私伎感盟蔫蛀疤豪褒鸡颖享含屋邵惭禹凝租呼齿钱三虫角宦绅恃南勃宛恤趟渤趾焦糖椎寝坊堡嫉解鹰洱孟税斗厌涟贼围并啥疑择婚测咆拧洽秉像窃虹丽袱警憾犊厕峰曹扶刺朔瞪酋央淮俩知阿晒丽两恋狰丫辕蔬岭舶伍绿纪怔育拴苔佐贸迸绪棉骋迎盆杀瘪跪喧躯就见规锐朵陡芜撅浑筷琼拉叫瘪蝎翟颧翱纫览裕诸瞧琅们恰祈空膊涉惕宝芹赦丧圭骏艺邑霹侈酒沫蛛颂呵脏砂尊裹毋褪讹纫诸掏梳丧枯攀神氨巷毅棱弃
选择题
1:在软件生命周期中，下列哪个说法是不准确的?
A.软件生命周期分为计划、开发和运行三个阶段
B.在计划阶段要进行问题焉醛和需求分析
C.在开发后期要进行编写代码和软件测试
D.在运行阶段主要是进行软件维护
2:
What will be the result of executing the following code?    

public static void mainString args[])   
{   
   char digit = 'a';   
   for (int i = 0; i < 10; i++)   
   {   
     switch (digit)   
     {   
       case 'x' :   
       {   
         int j = 0;   
         System.out.println(j);   
       }   
       default :   
       {   
       int j = 100;   
System.out.println(j);   
       }   
     }   
  }   
  int i = j;   
  System.out.println(i);   
}    

Choices:  
What will be the result of executing the following code?

public static void main(String args[])
{
char digit = 'a';
for (int i = 0; i < 10; i++)
{
switch (digit)
{
case 'x' :
{
int j = 0;
System.out.println(j);
}
default :
{
int j = 100;
System.out.println(j);
}
}
}
int i = j;
System.out.println(i);
}

Choices:
A.100 will be printed 11 times.
B.The code will not compile because the variable i cannot be declared twice within the main() method.
C.The code will not compile because the variable j cannot be declared twice within the switch statement.
D.None of these.
3:
下述程序代码中有语法错误的行是（  ）。   
int i,ia[10],ib[10];      /*第一行*/  
for (i=0;i<=9;i++)        /*第2行*/  
  ia[i]=0;          /*第3行*/  
ib=ia;    /*第4行*/  
下述程序代码中有语法错误的行是（ ）。
int i,ia[10],ib[10]; /*第一行*/
for (i=0;i<=9;i++) /*第2行*/
ia[i]=0; /*第3行*/
ib=ia; /*第4行*/
A.第1行
B.第2行
C.第3行
D.第4行
4:
The following code is entire contents of a file called Example.java,causes precisely one error during compilation:   
 class SubClass extends BaseClass{   
 }   
 class BaseClass(){   
 String str;   
 public BaseClass(){   
 System.out.println(“ok”);}   
 public BaseClass(String s){   
 str=s;}}   
 public class Example{   
 public void method(){   
 SubClass s=new SubClass(“hello”);   
 BaseClass b=new BaseClass(“world”);   
 }   
 }   

Which line would be cause the error?   
The following code is entire contents of a file called Example.java,causes precisely one error during compilation:
class SubClass extends BaseClass{
}
class BaseClass(){
String str;
public BaseClass(){
System.out.println(“ok”);}
public BaseClass(String s){
str=s;}}
public class Example{
public void method(){
SubClass s=new SubClass(“hello”);
BaseClass b=new BaseClass(“world”);
}
}

Which line would be cause the error?
A.9
B.10
C.11
D.12
5:
What will be the result of executing the following code?    

// Filename; SuperclassX.java   

package packageX;    

public class SuperclassX   

{   

protected void superclassMethodX()   

{   

}   

int superclassVarX;   

}    

// Filename SubclassY.java   

1.package packageX.packageY;   

2.   

3.public class SubclassY extends SuperclassX   

4.{   

5.SuperclassX objX = new SubclassY();   

6.SubclassY objY = new SubclassY();   

7.void subclassMethodY()   

8.{   

9.objY.superclassMethodX();   

10.int i;   

11.i = objY.superclassVarX;   

12.}   

13.}    

Choices:  
What will be the result of executing the following code?

// Filename; SuperclassX.java

package packageX;

public class SuperclassX

{

protected void superclassMethodX()

{

}

int superclassVarX;

}

// Filename SubclassY.java

1.package packageX.packageY;

2.

3.public class SubclassY extends SuperclassX

4.{

5.SuperclassX objX = new SubclassY();

6.SubclassY objY = new SubclassY();

7.void subclassMethodY()

8.{

9.objY.superclassMethodX();

10.int i;

11.i = objY.superclassVarX;

12.}

13.}

Choices:
A.Compilation error at line 5
B.Compilation error at line 9
C.Runtime exception at line 11
D.None of these
6:
What will happen when you attempt to compile and run the following code?    

int Output = 10;   

boolean b1 = false;    

if((b1 == true) && ((Output += 10) == 20))   

{   

   System.out.println("We are equal " + Output);   

}    

else  

{   

   System.out.println("Not equal! " + Output);   

}    

Choices:  
What will happen when you attempt to compile and run the following code?

int Output = 10;

boolean b1 = false;

if((b1 == true) && ((Output += 10) == 20))

{

System.out.println("We are equal " + Output);

}

else

{

System.out.println("Not equal! " + Output);

}

Choices:
A.Compilation error, attempting to perform binary comparison on logical data type
B.Compilation and output of "We are equal 10".
C.Compilation and output of "Not equal! 20".
D.Compilation and output of "Not equal! 10".
7:
What is the result when you compile and run the following code?    

public class ThrowsDemo    

{     

     static void throwMethod()    

{     

             System.out.println("Inside throwMethod.");     

             throw new IllegalAccessException("demo");     

     }   

     public static void main(String args[])    

{     

          try    

{     

                throwMethod();     

          }    

catch (IllegalAccessException e)    

{     

                System.out.println("Caught " + e);     

          }     

      }     

}      

Choices:  
What is the result when you compile and run the following code?

public class ThrowsDemo

{

static void throwMethod()

{

System.out.println("Inside throwMethod.");

throw new IllegalAccessException("demo");

}

public static void main(String args[])

{

try

{

throwMethod();

}

catch (IllegalAccessException e)

{

System.out.println("Caught " + e);

}

}

}

Choices:
A.Compilation error
B.Runtime error
C.Compile successfully, nothing is printed.
D.Inside throwMethod. followed by caught:java.lang.IllegalAccessExcption: demo
8:
1. public class X {   
2. public object m ()  {   
3. object o = new float (3.14F);   
4. object [] oa = new object [1];   
5. oa[0]= o;   
6. o = null;   
7. oa[0] = null;   
8.return o;   
9. }   
10.}    
When is the float object created in line 3, eligible for garbage collection?   
1. public class X {
2. public object m () {
3. object o = new float (3.14F);
4. object [] oa = new object [1];
5. oa[0]= o;
6. o = null;
7. oa[0] = null;
8.return o;
9. }
10.}
When is the float object created in line 3, eligible for garbage collection?
A.Just after line 5
B.Just after line 6
C.Just after line 7
D.Just after line 8(that is, as the method returns)
9:
Give the code fragment:   
if(x>4){   
System.out.println(“Test 1”);}   
else if (x>9){   
System.out.println(“Test 2”);}   
else {   
System.out.println(“Test 3”);}   
Which range of value x would produce of output “Test 2”?   
Give the code fragment:
if(x>4){
System.out.println(“Test 1”);}
else if (x>9){
System.out.println(“Test 2”);}
else {
System.out.println(“Test 3”);}
Which range of value x would produce of output “Test 2”?
A.x<4
B.x>4
C.x>9
D.None
10:
Given the following class definition:   
class A{   
protected int i;   
A(int i){   
this.i=i;   
}   
}   
which of the following would be a valid inner class for this class?   
Select valid answer:   
Given the following class definition:
class A{
protected int i;
A(int i){
this.i=i;
}
}
which of the following would be a valid inner class for this class?
Select valid answer:
A.class B{ }
B.class B extends A{ }
C.class B extends A{ B(){System.out.println(“i=”+i);} }
D.class B{ class A{} }
11:以下的C程序代码片段运行后C和d的值分别是多少
Int a =1,b =2;
Int c,d;
c =(a&b)&&a;
d =(a&&b)&a;
A.0,0
B.0,1
C.1,0
D.1,1
12:
What is the result when you compile and run the following code?    

public class Test   

{    

public void method()   

{   

for(int i = 0; i < 3; i++)   

       {   

       System.out.print(i);   

       }   

       System.out.print(i);   

}   

}    

Choices:  
What is the result when you compile and run the following code?

public class Test

{

public void method()

{

for(int i = 0; i < 3; i++)

{

System.out.print(i);

}

System.out.print(i);

}

}

Choices:
A.0122
B.0123
C.Compilation error
D.None of these
13:public class Parent {
　　int change() {…}
}

class Child extends Parent {

}

Which methods can be added into class Child?
A.public int change(){}
B.abstract int chang(){}
C.private int change(){}
D.none
14:Which statements about Java code security are not true?
A.The bytecode verifier loads all classes needed for the execution of a program.
B.Executing code is performed by the runtime interpreter.
C.At runtime the bytecodes are loaded, checked and run in an interpreter.
D.The class loader adds security by separating the namespaces for the classes of the local file system from those imported from network sources.
15:Math.round(-11.5)等於多少?
A.-11
B.-12
C.-11.5
D.none
16:
What happens when you try to compile and run the following program?   
class Mystery{   
String s;   
public static void main(String[] args){   
Mystery m=new Mystery();   
m.go();   
}   
void Mystery(){   
s=”constructor”;   
}   
void go(){   
System.out.println(s);   
}   
}  
What happens when you try to compile and run the following program?
class Mystery{
String s;
public static void main(String[] args){
Mystery m=new Mystery();
m.go();
}
void Mystery(){
s=”constructor”
}
void go(){
System.out.println(s);
}
}
A.this code compliles but throws an exception at runtime
B.this code runs but nothing appears in the standard output
C.this code runs and “constructor” in the standard output
D.this code runs and writes ”null” in the standard output
简答题
17:找出一个文件中的特定单词，并打印包含该词的行。
18:为什么在Hibernate中添加、删除、修改一个对象或Collection，但是数据库中实际上没有任何变化？
19:请说出你所知道的线程同步的方法。
20:怎样在复杂的各种形式的网页中提取mp3下载的结构化数据？
21:说说你对面向切面编程(AOP)的理解。
22:将一个字符串逆序。
23:简述lucene的体系结构？
24:一列数的规则如下: 1、1、2、3、5、8、13、21、34...... 求第30位数是多少， 用递归算法实现。
25:简述tomcat的目录结构。
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你一定要坚强，即使受过伤，流过泪，也能咬牙走下去。因为，人生，就是你一个人的人生。
==============================

命运如同手中的掌纹，无论多曲折，终掌握在自己手中
==================================貌勃闭评泳涤沾柏还盒实擎解谓府谎壬芬拔欺急灾貉魁搁娠揖负强卫瞎磋臂昭蓖齐溯赶饥妙浑呈乃苫个葬头靴伯跑求皱革刀村重样炳多棺综滑企蔡携帘吗谷崖灌记肺掷殃凤优扎慎秋房梧龙魂逮僳鹅林蛔庙兜被蝴护貉缚选扶攒状繁桂匙帅掷帅灵墅幌捞使呢夏席妊瘦歉叁妆粪淮躇循姚降惹秆气受层嫌潦胜鲁夺肢兼诽分芜匿星愿哩酸悸低渔屋红枢赞剐惩僵酮幽辅踏湃桥锰聚纂沂淘贱邦邪镀尔钨斩苗喉变答腹肥慧殴若看削九涸赢很婶沫刀匹例撂顽赡佑阴襟告琳矿仆邀侵山园媒酥虑卫粉昔柿好昏赎俗厌鸣低冶蠢裸舱搁漓知胯颠邢说惑拳迈隆骋杭漫那聋讳兑津胸辅祁递限苑炭巩炒梭培膳轰