1C#程序员面试题20110212

伊克斯数码软件研发工程师招聘要求及能力测试C#1.定义一个已排序数组int[]numarray=new int[]{1,5,10,15,18,23,45,56}，使用二分法算法查找出45这个数。

2.在不生成临时string数组的前提下，将已有数组中的字符反向排列。

（不要使用Array.Reverse()方法）注：以下题目均默认已正确引入命名空间3.int[][]myArray3=new int[3][]{new int[3]{5,6,2},new int[5]{6,9,7,8,3},new int[2]{3,2}};则，myArray3[2][2]的值是多少:结果：4.请给出以下程序的输出结果namespace TestPaper{public class TestClass{public TestClass(){_value="Constructor Value";}public void OutputData(){Console.WriteLine("_value={0}",_value);}public string_value="Default Initialize Value";}class Program{static void Main(string[]args){TestClass test1=new TestClass();test1.OutputData();TestClass test2=new TestClass(){_value="Initialize Value"};test2.OutputData();}}}结果：5.请指出以下程序错误namespace TestPaper{class Program{static void Main(string[]args){B b=new B();b.fun();}}class A{public int X{private get;set;}}class B{protected A a=new A();public void fun(){a.X=10;Console.WriteLine(a.X);}}}结果：6.请给出以下程序的输出结果namespace TestPaper{class Program{static void Main(string[]args){int x=5,y=8,z=11;Console.WriteLine(++x*--y+z++);}}}结果：7.请给出以下程序的输出结果namespace TestPaper{class Program{static void Main(string[]args){int x=1,y=3,z=5;test(ref x,out y,z);Console.WriteLine("x is{0},y is{1},z is{2}",x,y,z);}static void test(ref int x,out int y,int z){x=10;y=5;z=13;}}}结果：8.请给出以下程序的输出结果namespace TestPaper{class Program{static void Main(string[]args){test();}static void test(){try{throw new ArgumentException("参数异常");}catch(ArgumentException ex){Console.WriteLine("ArgumentException");}catch(Exception ex){Console.WriteLine("Exception");}finally{Console.WriteLine("Finally");}}}}结果：9.请指出以下程序错误namespace TestPaper{public class TestClass{public TestClass(){_readonLyValue=5;_constValue=5;}public void OutputData(){_readonLyValue=10;_constValue=10;}private readonly int_readonLyValue;private const int_constValue;}class Program{static void Main(string[]args){TestClass test1=new TestClass();test1.OutputData();}}}结果：10.请给出以下程序的输出结果namespace TestPaper{public class BaseClass{public void DisplayName(){Console.WriteLine("BaseClass");}}public class DerivedClass:BaseClass{public virtual void DisplayName(){Console.WriteLine("DerivedClass");}}public class SubDerivedClass:DerivedClass{public override void DisplayName(){Console.WriteLine("SubDerivedClass");}}public class SuperSubDerivedClass:SubDerivedClass{public new void DisplayName(){Console.WriteLine("SuperSubDerivedClass");}}class Program{static void Main(string[]args){SuperSubDerivedClass superSubDerivedClass=new SuperSubDerivedClass();SubDerivedClass subDerivedClass=superSubDerivedClass;DerivedClass derivedClass=superSubDerivedClass;BaseClass baseClass=superSubDerivedClass;superSubDerivedClass.DisplayName();subDerivedClass.DisplayName();derivedClass.DisplayName();baseClass.DisplayName();}}}结果：11.请给出以下程序的输出结果namespace TestPaper{class Program{static void Main(string[]args){OperatorA a1=new OperatorA();OperatorA a2=new OperatorA();a1.Num=7;a2.Num=6;Console.WriteLine(a1==a2);}}class OperatorA{public int Num{get;set;}public static bool operator==(OperatorA a1,OperatorA a2){ return(a1.Num>a2.Num);}public static bool operator!=(OperatorA a1,OperatorA a2){ return!(a1==a2);}public override bool Equals(object obj){return(this.Num>((OperatorA)obj).Num);}public override int GetHashCode(){return base.GetHashCode();}}}结果：12.请指出以下程序错误namespace TestPaper{public interface Interface1{void DisplayInfo();}public interface Interface2{void OutputData();}public class TestClass:Interface1,Interface2{public TestClass(){}void Interface1.DisplayInfo(){Console.WriteLine("This is DisplayInfo of Interface1");}public void OutputData(){Console.WriteLine("This is OutputData of Interface2");}}class Program{static void Main(string[]args){TestClass test=new TestClass();test.OutputData();test.DisplayInfo();}}}结果：13.请给出以下程序的输出结果namespace TestPaper{public class AnotherClass{public AnotherClass(string str){_value=str;}public void TestOutput(){Console.WriteLine("_value={0}",_value);}private string_value;}public class BaseClass{public BaseClass(string value){Value=value;}public static explicit operator AnotherClass(BaseClass baseClass){ Console.WriteLine("Converting from BaseClass to AnotherClass");return new AnotherClass(baseClass.Value);}public string Value{get;set;}}public class DerivedClass:BaseClass{public DerivedClass(string value):base(value){}}class Program{static void Main(string[]args){BaseClass baseClass=new DerivedClass("Hello");if(baseClass is DerivedClass)Console.WriteLine("baseClass is DerivedClass");elseConsole.WriteLine("baseClass isn't DerivedClass");if(baseClass is AnotherClass)Console.WriteLine("baseClass is AnotherClass");elseConsole.WriteLine("baseClass isn't AnotherClass");AnotherClass anotherClass=(AnotherClass)baseClass;anotherClass.TestOutput();}}}结果：14.请给出以下程序的输出结果namespace TestPaper{class Program{static void Main(string[]args){Action<int,int>fun=(x,y)=>Console.WriteLine(x*y);fun+=test;run(fun,5,10);}static void test(int x,int y){Console.WriteLine(x+y*x);}static void run(Action<int,int>fun,int x,int y){fun(x,y);}}}结果：15.请指出以下程序错误namespace TestPaper{class Program{static void Main(string[]args){using(Test tt=new Test()){tt.a=100;tt.b="host";Console.WriteLine("a is{0},b is{1}",tt.a,tt.b);}}}class Test{public int a=0;public string b="";public void Dispose(){a=0;b="";}}}结果：16.请给出以下程序的输出结果namespace TestPaper{struct Test{public int Value{get{return_value;}set{_value=value;}}public Test(int v){_value=v;}private int_value;}class Program{static void Main(string[]args){Test t1=new Test(5);object o=t1;Test t2=(Test)o;t2.Value=10;Console.WriteLine(t1.Value);Console.WriteLine(t2.Value);Console.WriteLine(((Test)o).Value);}}}结果：17.请指出以下程序错误namespace TestPaper{public class TestGenericClass<T>where T:class{public TestGenericClass(){}public void Add(T data){_list.Add(data);}public void Add(T[]data){_list.AddRange(data);}public void OutputCount(){Console.WriteLine("The items count of the instance is{0}",_list.Count);}private List<T>_list=new List<T>();}class Program{static void Main(string[]args){TestGenericClass<int>testClass=new TestGenericClass<int>();testClass.Add(5);testClass.Add(new int[]{10,100});testClass.OutputCount();}}}结果：18.请给出以下程序的输出结果namespace TestPaper{class Program{static ManualResetEvent mainEvent;static ManualResetEvent doworkEvent;public static void DoWork(){Console.WriteLine("DoWork()started...");doworkEvent.Set();mainEvent.WaitOne();Console.WriteLine("DoWork()ending...");}static void Main(string[]args){using(mainEvent=new ManualResetEvent(false))using(doworkEvent=new ManualResetEvent(false)){Console.WriteLine("Application started...");Console.WriteLine("Starting task...");Thread task=new Thread(DoWork);task.Start();doworkEvent.WaitOne();Console.WriteLine("Thread executing...");mainEvent.Set();task.Join();Console.WriteLine("Thread completed");Console.WriteLine("Application shutting down...");}}}}结果：19.请指出以下程序错误namespace TestClass{public class TestClass1{public static string StaticFun(int a){return a.ToString()+"static";}public string Fun(int a){return a.ToString();}}}以上类生成一个Dll文件，位于..\TestClass.dllnamespace Test{class Program{static void Main(string[]args){Assembly ass=Assembly.LoadFile(@"..\TestClass.dll");//路径没错误Type type=ass.GetType("TestClass1");MethodInfo methodinfo=type.GetMethod("Fun");object obj=ass.CreateInstance("TestClass1");string result=(string)methodinfo.Invoke(obj,new object[]{134});Console.WriteLine(result);Console.Read();}}}结果：20.请给出以下程序的输出结果namespace TestPaper{class Program{private static string[]Keywords={"abstract","add*","alias*","as","ascending","base","bool","break","by*","byte"};private static void TestOutput(){int delegateCounter=0;Func<string,string>func=text=>{delegateCounter++;return text;};IEnumerable<string>selection=from keyword in Keywords where keyword.Contains('*')select func(keyword);Console.WriteLine("1.delegateCounter={0}",delegateCounter);Console.WriteLine("2.Contextual Keyword Count={0}",selection.Count());Console.WriteLine("3.delegateCounter={0}",delegateCounter);Console.WriteLine("4.Contextual Keyword Count={0}",selection.Count());Console.WriteLine("5.delegateCounter={0}",delegateCounter);List<string>selectionCache=selection.ToList();Console.WriteLine("6.delegateCounter={0}",delegateCounter);Console.WriteLine("7.selectionCache Count={0}",selectionCache.Count());Console.WriteLine("8.delegateCounter={0}",delegateCounter);}static void Main(string[]args){TestOutput();}}}结果：。