思迁数码科技招聘Java软件工程师笔试真题
选择题
1: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.
2: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
3:
Give the following code:
public class Example{
public static void main(String args[] ){
int l=0;
do{
System.out.println(“Doing it for l is:”+l);
}while(--l>0)
System.out.println(“Finish”);
}
}
Which well be output:
Give the following code:
public class Example{
public static void main(String args[] ){
int l=0;
do{
System.out.println(“Doing it for l is:”+l);
}while(--l>0)
System.out.println(“Finish”);
}
}
Which well be output:
A.Doing it for l is 3
B.Doing it for l is 1
C.Doing it for l is 2
D.Doing it for l is 0
4:Math.round(11.5)等於多少?
A.11
B.12
C.11.5
D.none
5:
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".
6:
What will happen when you attempt to compile and run the following code?
(Assume that the code is compiled and run with assertions enabled.)
public class AssertTest{
public void methodA(int i){
assert i >= 0 : methodB();
System.out.println(i);
}
public void methodB(){
System.out.println("The value must not be negative");
}
public static void main(String args[]){
AssertTest test = new AssertTest();
test.methodA(-10);
}
}
What will happen when you attempt to compile and run the following code?
(Assume that the code is compiled and run with assertions enabled.)
public class AssertTest{
public void methodA(int i){
assert i >= 0 : methodB();
System.out.println(i);
}
public void methodB(){
System.out.println("The value must not be negative");
}
public static void main(String args[]){
AssertTest test = new AssertTest();
test.methodA(-10);
}
}
A.it will print -10
B.it will result in AssertionError showing the message-“the value must not be negative”.
C.the code will not compile.
D.None of these.
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:假定a和b为int型变量,则执行下述语句组后,b的值为
a=1;
b=10;
do
{
b-=a;
a++;
} while (b--<0);
A.9
B.-2
C.-1
D.8
9:
public class X{
public Object m(){
Object o = new Float(3.14F);//line 3
Object [] oa = new Object[1];//line 4
oa[0] = o;//line 5
o=null;//line 6
return oa[0];//line 7
}
}
When is the Float object, created in line 3,eligible for garbage collection?
public class X{
public Object m(){
Object o = new Float(3.14F);//line 3
Object [] oa = new Object[1];//line 4
oa[0] = o;//line 5
o=null;//line 6
return oa[0];//line 7
}
}
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(that is,as the method returns)
D.never in this method
10:Math.round(-11.5)等於多少?
A.-11
B.-12
C.-11.5
D.none
11:In the following pieces of code, which one will compile without any error?
A.StringBuffer sb1 = "abcd";
B.Boolean b = new Boolean("abcd");
C.C: byte b = 255;
D.float fl = 1.2;
12:
Give the following method:
public void method( ){
String a,b;
a=new String(“hello world”);
b=new String(“game over”);
System.out.println(a+b+”ok”);
a=null;
a=b;
System.out.println(a);
}
In the absence of compiler optimization, which is the earliest point the object a refered is definitely elibile to be garbage collection.
Give the following method:
public void method( ){
String a,b;
a=new String(“hello world”);
b=new String(“game over”);
System.out.println(a+b+”ok”);
a=null;
a=b;
System.out.println(a);
}
In the absence of compiler optimization, which is the earliest point the object a refered is definitely elibile to be garbage collection.
A.before line 5
B.before line 6
C.before line 7
D.before line 9
13:
Give the following java class:
public class Example{
static int x[]=new int[15];
public static void main(String args[]){
System.out.println(x[5]);
}
}
Which statement is corrected?
Give the following java class:
public class Example{
static int x[]=new int[15];
public static void main(String args[]){
System.out.println(x[5]);
}
}
Which statement is corrected?
A.When compile, some error will occur.
B.When run, some error will occur.
C.Output is zero.
D.Output is null.
14: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
简答题
15:15个教徒和15 个非教徒在深海上遇险，必须将一半的人投入海中，其余的人才能幸免于难，于是想了一个办法：30个人围成一圆圈，从第一个人开始依次报数，每数到第九个人就将他扔入大海，如此循环进行直到仅余15个人为止。问怎样排法，才能使每次投入大海的都是非教徒。
16:构造器Constructor是否可被override?
17:简单介绍一下IOC的实现原理。(写出代码最好)
18:说出数据连接池的.工作机制是什么?
19:列出一些控制流程的方法;
20:找出两个字符串中最大子字符串,如"abractyeyt","dgdsaeactyey"的最大子串为"actyet"
21:请写一个java程序实现数据库缓冲池的功能?
22:Tomcat里实现会话session复制，有那些方法?
23:简单介绍JSP的标记库?
24:hibernate的2级缓存有那些缓存策略?每种缓存策略的使用范围?
25:不用乘法或加法给一个数增加7倍。
【思迁数码科技招聘Java软件工程师笔试真题】相关文章：
用友JAVA笔试真题07-24
沃尔玛招聘笔试真题分享12-26
雀巢校园招聘往届笔试真题11-21
软件开发工程师JAVA笔试题10-15
平安银行校园招聘笔试真题结构04-03
最新中兴Java语言笔试真题及答案09-24
Java招聘笔试题目03-03
Java软件开发工程师笔试题宝典10-15
JAVA类软件研发工程师笔试题目03-04
华为招聘程序员笔试真题分享07-15