Question 34. (单选)在C#中利用Socket进行网络通信编程的一般步骤是：建立Socket侦听、（ ）、利用Socket接收和发送数据。1. 建立Socket连接2. 获得端口号；3. 获得IP地址；4. 获得主机名；Question 35. (单选)如果设treeView1=new TreeView(),TreeNode node=new TreeNode("根结点" )，则treeView1.Nodes.Add(node)返回的是一个 ()类型的值。1. TreeNode；2. int；3. string；4. TreeView；Question 36. (单选)声明一个委托public delegate int myCallBack(int x); 则用该委托产生的回调方法的原型应该是1. void myCallBack(int x)2. int receive(int num)3. string receive(int x)4. 不确定的Question 37. (单选)关于ASP.NET中的代码隐藏文件的描述正确的是1. Web窗体页的程序的逻辑由代码组成，这些代码的创建用于与窗体交互。编程逻辑唯一与用户界面不同的文件中。该文件称作为“代码隐藏”文件，如果用C＃创建，该文件2. 项目中所有Web窗体页的代码隐藏文件都被编译成.EXE文件3. 项目中所有的Web窗体页的代码隐藏文件都被编译成项目动态链接库（.dll）文件4. 以上都不正确Question 38. (单选)What compiler switch creates an xml file from the xml comments in the files in an assembly?1. /text2. /doc3. /xml4. /helpQuestion 39. (单选)下面的代码实现了设计模式中的什么模式public class A {private A instance;private A() {}public static A Instance {get{if ( A == null )A = new A();return instance;}}}1. Factory2. Abstract Factory3. Singleton4. BuilderQuestion 40. (单选)class Class1{public static int Count = 0;static Class1(){Count++;}public Class1(){Count++;}}Class1 o1 = new Class1();Class1 o2 = new Class1();请问，Class1.Count的值是多少？( )1. 12. 23. 34. 4 Question 41. (单选)
abstract class BaseClass{public virtual void MethodA(){Console.WriteLine("BaseClass");}public virtual void MethodB(){}}class Class1: BaseClass{public void MethodA(){Console.WriteLine("Class1");}public override void MethodB(){}}class Class2: Class1{new public void MethodB(){}}class MainClass{public static void Main(string[] args){Class2 o = new Class2();o.MethodA(); }}请问，此程序输出结果是:1. BaseClass2. BassClass Class13. Class14. Class1 BassClass Question 42. (单选)public static void Main(string[] args){int i = 2000;object o = i;i = 2001;int j =(int) o;Console.WriteLine("i={0},o={1}, j={2}",i,o,j);}1. i=2001,o=2000,j=20002. i=2001,o=2001,,j=20013. i=2000,o=2001,,j=20004. i=2001,o=2000,j=2001Question 43. (多选)您要创建ASP.NET应用程序用于运行AllWin公司内部的Web站点，这个应用程序包含了50个页面。您想要配置这个应用程序以便当发生一个HTTP代码错误时它可以显示一个自定义的错误页面给用户。您想要花最小的代价完成这些目标，您应该怎么做？(多选)1. 在这个应用程序的Global.asax文件中创建一个Application_Error过程去处理ASP.NET代码错误。2. 在这个应用程序的Web.config文件中创建一个applicationError节去处理ASP.NET代码错误。3. 在这个应用程序的Global.asax文件中创建一个CustomErrors事件去处理HTTP错误。4. 在这个应用程序的Web.config文件中创建一个CustomErrors节去处理HTTP错误。Question 44. (单选)如下程序的运行结果是：public abstract class A { public A() { Console.WriteLine(''A''); } public virtual void Fun() { Console.WriteLine("A.Fun()"); } } public class B: A { public B() { Console.WriteLine(''B''); } public new void Fun() { Console.WriteLine("B.Fun()"); } public static void Main() { A a = new B(); a.Fun(); } } 1. A B A.Fun() 2. A B B.Fun()3. B A A.Fun()4. B A B.Fun()Question 45. (单选)Which of these string definitions will prevent escaping on backslashes in C#?*1. string s = #”n Test string”;2. string s = “’n Test string”;3. string s = @”n Test string”;4. string s = “n Test string”;Question 46. (单选)Which of the following operations can you NOT perform on an ADO.NET DataSet?1. A DataSet can be synchronised with a RecordSet.2. A DataSet can be synchronised with the database.3. A DataSet can be converted to XML.4. You can infer the schema from a DataSetQuestion 47. (单选)In Object Oriented Programming, how would you describe encapsulation?1. The conversion of one type of object to another.2. The runtime resolution of method calls.3. The exposition of data.4. The separation of interface and implementation.Question 48. (单选)How does assembly versioning in .NET prevent DLL Hell?1. The runtime checks to see that only one version of an assembly is on the machine at any one time.2. .NET allows assemblies to specify the name AND the version of any assemblies they need to run.3. The compiler offers compile time checking for backward compatibility.4. It doesn’t.Question 49. (单选)三种常用的字符串判空串方法：1: bool isEmpty = (str.Length == 0); 2: bool isEmpty = (str == String.Empty); 3: bool isEmpty = (str == "");哪种方法最快？1. 12. 23. 3Question 50. (单选)public sealed class SampleSingleton1{private int m_Counter = 0;private SampleSingleton1(){Console.WriteLine(""初始化SampleSingleton1。"");}public static readonly SampleSingleton1 Singleton = new SampleSingleton1();public void Counter(){m_Counter ++;}} 以上代码实现了设计模式中的哪种模式？1. 原型2. 抽象工厂3. 单键4. 生成器 转:http://www.chinacs.net/archives/1/2006/3873.html
abstract class BaseClass{public virtual void MethodA(){Console.WriteLine("BaseClass");}public virtual void MethodB(){}}class Class1: BaseClass{public void MethodA(){Console.WriteLine("Class1");}public override void MethodB(){}}class Class2: Class1{new public void MethodB(){}}class MainClass{public static void Main(string[] args){Class2 o = new Class2();o.MethodA(); }}请问，此程序输出结果是:1. BaseClass2. BassClass Class13. Class14. Class1 BassClass Question 42. (单选)public static void Main(string[] args){int i = 2000;object o = i;i = 2001;int j =(int) o;Console.WriteLine("i={0},o={1}, j={2}",i,o,j);}1. i=2001,o=2000,j=20002. i=2001,o=2001,,j=20013. i=2000,o=2001,,j=20004. i=2001,o=2000,j=2001Question 43. (多选)您要创建ASP.NET应用程序用于运行AllWin公司内部的Web站点，这个应用程序包含了50个页面。您想要配置这个应用程序以便当发生一个HTTP代码错误时它可以显示一个自定义的错误页面给用户。您想要花最小的代价完成这些目标，您应该怎么做？(多选)1. 在这个应用程序的Global.asax文件中创建一个Application_Error过程去处理ASP.NET代码错误。2. 在这个应用程序的Web.config文件中创建一个applicationError节去处理ASP.NET代码错误。3. 在这个应用程序的Global.asax文件中创建一个CustomErrors事件去处理HTTP错误。4. 在这个应用程序的Web.config文件中创建一个CustomErrors节去处理HTTP错误。Question 44. (单选)如下程序的运行结果是：public abstract class A { public A() { Console.WriteLine(''A''); } public virtual void Fun() { Console.WriteLine("A.Fun()"); } } public class B: A { public B() { Console.WriteLine(''B''); } public new void Fun() { Console.WriteLine("B.Fun()"); } public static void Main() { A a = new B(); a.Fun(); } } 1. A B A.Fun() 2. A B B.Fun()3. B A A.Fun()4. B A B.Fun()Question 45. (单选)Which of these string definitions will prevent escaping on backslashes in C#?*1. string s = #”n Test string”;2. string s = “’n Test string”;3. string s = @”n Test string”;4. string s = “n Test string”;Question 46. (单选)Which of the following operations can you NOT perform on an ADO.NET DataSet?1. A DataSet can be synchronised with a RecordSet.2. A DataSet can be synchronised with the database.3. A DataSet can be converted to XML.4. You can infer the schema from a DataSetQuestion 47. (单选)In Object Oriented Programming, how would you describe encapsulation?1. The conversion of one type of object to another.2. The runtime resolution of method calls.3. The exposition of data.4. The separation of interface and implementation.Question 48. (单选)How does assembly versioning in .NET prevent DLL Hell?1. The runtime checks to see that only one version of an assembly is on the machine at any one time.2. .NET allows assemblies to specify the name AND the version of any assemblies they need to run.3. The compiler offers compile time checking for backward compatibility.4. It doesn’t.Question 49. (单选)三种常用的字符串判空串方法：1: bool isEmpty = (str.Length == 0); 2: bool isEmpty = (str == String.Empty); 3: bool isEmpty = (str == "");哪种方法最快？1. 12. 23. 3Question 50. (单选)public sealed class SampleSingleton1{private int m_Counter = 0;private SampleSingleton1(){Console.WriteLine(""初始化SampleSingleton1。"");}public static readonly SampleSingleton1 Singleton = new SampleSingleton1();public void Counter(){m_Counter ++;}} 以上代码实现了设计模式中的哪种模式？1. 原型2. 抽象工厂3. 单键4. 生成器 转:http://www.chinacs.net/archives/1/2006/3873.html
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