考題附帶參級(jí)考試題

一、選擇題1.InC#whatisbaseclassofallreferenceB.A.doublea一、選擇題1.InC#whatisbaseclassofallreferenceB.A.doublea=B.longb=C.stringc=D.intd=3.Choosetheoutputofthecodedoublea=10,b=B.C.D.7.WhichofthefollowingkeywordisusedwhenavirtualisrefinedbyaderivedA: 8.Whichofthefollowingarecorrectwaystopassaparametertoa1)ByA12)by3)by4)byBC9ifamethodismarkedasprotectedwhocanaccessAclassesinthedeclaringBonlymethodsthatareinthesameclassCclassedderivedfromthedeclaringDanywheretheapplicationhasareferencetoanobjectofthatbase10.Ifyouwanttoselectallthenumberswhicharegreeterthan1000inanintarray,whichofthefollowingcanyouuse?（LINQtoObject,LINQtoXML,LINQtoSQL,LINQtoDataSet，LINQtoB.LINQToXMLC.LINQToSQLD.NoneofThestatementf=delegate(intx){returnx+1;};isequivalenttowhichofthefollowingA.f(x)=>x+B.f(x)=x+C.f=>x+1;D.f=x=>x+1;InC#,wecanusethefollowingstatementtoconvertastringstoanintegernum1241)intnum=Convert.ToInt32(s);3)intnum=s.ToInt();4)intnum=二、判斷題Inaswitchstatement,everystatementsequenceinacaseclausemustbeterminatedwithbreak(orreturn,goto,throw).TPropertyclass,structinterface里。5.ifaconstructorwasdeclared,nodefaultconstructorisgeneratednestedtypescannotbeinterfacesanddelegatesOnlytheclassthatnestedtypescannotbeinterfacesanddelegatesOnlytheclassthatdeclarestheeventcanfireit.InC#,wecanonlythrowanexceptionbyaninvalidoperation.三、填空題（2*73*6Aconstructormaycallanotherconstructorwiththe InC#,ifyouwanttochangeathread’sstatefromsuspendedintorunning,youshouldcall .Resume() variablerepresentsclasswideinformationthatissharedbyalltheobjectsof靜態(tài)變class.In isusedtoretrievespecificelementinanenumerableobjectdirectlyIndexer索引InC#,isasetoftypesthatarecompiledtogetheranditisthesmallestunitfor程序anddynamicloading.泛型7.Thefollowingclassisoften Class.Buffer<Element>{privateElement[]data;publicBuffer(intsize){…}publicElement8.Supposeyouhaveadoublearraycallednumbers,pleasesumalltheelementsofthearrayforeach doublesum foreach(xin sum+=UsingSystem;classShowName(){}}classShowName(){}}classpublicnewvirtualvoid}}}}class}}class}} 12.Whatistheoutputofthefollowingprogram?UsingSystem;classintpublicFraction(intx,inty){this.x=x;this.y=}ToString(){returnx+“/”}publicoverrideintGetHashCode(){returnx^y;}o){Fractionf=(Fraction)o;returnf.x==x&&f.y==y;}publicFractionreturn}classFractiona=newFraction(1,2);Fractionb=newFraction(1,2);Fractionc=newFraction(3,4);Console.WriteLine(a==b);a=c.ShallowCopy();}} 13.Pleasefillintheblanks.namespacetest{publicclass{void} 13.Pleasefillintheblanks.namespacetest{publicclass{void//PleasewritecodetocallOnNew}}}}1.WhatisthedifferencebetweenOverloadingand重載Overloading：一個(gè)類(lèi)中定義了兩個(gè)或兩個(gè)以上的方法，這些方法參數(shù)數(shù)量不同或 重寫(xiě)Overriding：在子類(lèi)存在方法與父類(lèi)的名字相同而且參數(shù)的