C# Interview QuestionsWord文件下载.docx

C# Interview QuestionsWord文件下载.docx

《C# Interview QuestionsWord文件下载.docx》由会员分享，可在线阅读，更多相关《C# Interview QuestionsWord文件下载.docx（14页珍藏版）》请在冰点文库上搜索。

clientside.thereisnoneedtogotovalidateuserinput.Ifitrelatestodatabasevalidationweneedtovalidateatserverside.

4.Whatdoesthe"

EnableViewState"

propertydo?

WhywouldIwantitonoroff?

ITkeepsthedataofthecontrolduringpostbacks.

ifweturnoffthevaluesshouldnotpopulateduringserverroundtrip.

5.WhatisthedifferencebetweenServer.TransferandResponse.Redirect?

WhywouldIchooseoneovertheother?

Server.Trnasferwillpreventroundtrip.itwillredirectpageswhichorinthesamedirectory.NOwaytopassthequerystrings.Thruhttpcontextwecanabletogetthepreviouspagecontrolvalues.

Response.Redirect:

Thereisaroundtriptoprocesstherequest.Wecanredirecttoanypageexternal/internalotherthanaspx.Wecanpassthequerystringthruwhichwecanmanagesessions.

6.Canyougiveanexampleofwhenitwouldbeappropriatetouseawebserviceasopposedtoanon-serviced.NETcomponent

WebservicesarebestsuiteforHetrogeniousenvironment.

RemotingisbestsuiteforHomogeniousenvironment.ThesystemsthatunderCLR.

7.Let'

ssayIhaveanexistingapplicationwrittenusingVisualStudio6（VB6,InterDev6）andthisapplicationutilizesWindows2000COM+transactionservices.Howwouldyouapproachmigratingthisapplicationto.NET

WeneedtohaveWrappertocommunicateCOMcomponentsin.net.andvisversa

CCW:

ComCallablewrapper.

RCW:

RUNtimecallablewrapper.

8.CanyouexplainthedifferencebetweenanADO.NETDatasetandanADORecordset?

\

DIsconnectedarchitechure.Maintainacerelationschemas.MUtilpletablegrouping.

Connectedone.

9.CanyougiveanexampleofwhatmightbebestsuitedtoplaceintheApplication_StartandSession_Startsubroutines?

APplication_startneedforglobalvariablewhichareavailableovertheapplication.

Sesssion_Start:

logindependent（userdependent）

10.IfI'

mdevelopinganapplicationthatmustaccomodatemultiplesecuritylevelsthoughsecureloginandmyASP.NETwebappplicationisspannedacrossthreeweb-servers（usinground-robbinloadbalancing）whatwouldbethebestapproachtomaintainlogin-instatefortheusers?

DatabaseSupport.

orThrustateservice.

11.WhatareASP.NETWebForms?

HowisthistechnologydifferentthanwhatisavailablethoughASP（1.0-3.0）?

ASP.Interprepter..usethescriptengine.

ASP.NetCompiled.

12.HowdoesVB.NET/C#achievepolymorphism?

Functionoverloading.

Operatoroverloading.

13.Canyouexplainwhatinheritanceisandanexampleofwhenyoumightuseit?

Heredity.

Usetheexistingfunctionalityalongwithitsownproperities.

14.HowwouldyouimplementinheritanceusingVB.NET/C#?

DerivedClass:

Basecalss

VB.NEt:

DerivedClassInheritsBaseclass

15.Whatsanassembly

ABasicunitofexecutablecode>

Whichcontains:

Manifest-Metadata

versioning,Calture,IL,Reference

16.Describethedifferencebetweeninlineandcodebehind-whichisbestinalooselycoupledsolutionTightlycoupled-INLINE

inlinefunctionbindatcompiletimecanwriteinaspxpagewithin<

%%>

.

17.Explainwhatadiffgramis,andagooduseforone

isanxmlgrammer.Ittalksaboutstateofnodeinxmlfile.

18.WherewouldyouuseaniHTTPModule,andwhatarethelimitationsofanyapproachyoumighttakeinimplementingone

PreprocessingbeforegoingtoIIS.

19.Whatarethedisadvantagesofviewstate/whatarethebenefits

ITcanbehacked.pagesizeisheavy.

20.HowwouldyougetASP.NETrunninginApachewebservers-whywouldyouevendothis?

----InstallMod_AspDotNet

AddattheendofC:

\ProgramFiles\ApacheGroup\Apache2\conf\httpd.confthefollowinglines

21.WhatsMSIL,andwhyshouldmydevelopersneedanappreciationofitifatall?

MicrosoftIntermediatelanguage.whichistheoutputforallthe.netsupportedlanguagesaftercompilationwillproduce.

Appreciationforcrosslanguagesupport.

22.InwhatorderdotheeventsofanASPXpageexecute.Asadeveloperisitimportanttounderstandtheseevents?

INIT,PageLoad,Prerender,UNload.

23.WhichmethoddoyouinvokeontheDataAdaptercontroltoloadyourgenerateddatasetwithdata?

Fill（）

24.CanyoueditdataintheRepeatercontrol?

NO

25.Whichtemplatemustyouprovide,inordertodisplaydatainaRepeatercontrol?

ITemtemplate

26.HowcanyouprovideanalternatingcolorschemeinaRepeatercontrol?

AlternateItemTemplate

27.Whatpropertymustyouset,andwhatmethodmustyoucallinyourcode,inordertobindthedatafromsomedatasourcetotheRepeatercontrol?

Datasource,

DataBind

28.WhatbaseclassdoallWebFormsinheritfrom?

System.Web.UI.Page

29.Whatmethoddoyouusetoexplicitlykillauserssession?

abondon（）

30.Howdoyouturnoffcookiesforonepageinyoursite?

disablecookies.

31.Whichtwopropertiesareoneveryvalidationcontrol?

controltovalidate,errormessage

32.Whattagsdoyouneedtoaddwithintheasp:

datagridtagstobindcolumnsmanually?

autogeneratedcolumnsissettofalse

33.Howdoyoucreateapermanentcookie?

Cooke=newcookie（）.

cooke.adddate.

34.WhattagdoyouusetoaddahyperlinkcolumntotheDataGrid?

hyperlinkcolumn

35.Whichmethoddoyouusetoredirecttheusertoanotherpagewithoutperformingaroundtriptotheclient?

Server.Transfer

36.WhatisthetransportprotocolyouusetocallaWebserviceSOAP

http

37.TrueorFalse:

AWebservicecanonlybewrittenin.NET

false

38.WhatdoesWSDLstandfor?

webservicediscriptionlanguage.itisusedtogenerateforproxy（serverobject）

39.WhatpropertydoyouhavetosettotellthegridwhichpagetogotowhenusingthePagerobject?

PageIndex.

40.WhereontheInternetwouldyoulookforWebservices?

UDDI

41.Whattagsdoyouneedtoaddwithintheasp:

datagridtagstobindcolumnsmanually.

Autogeneratecolumns

42.WhichpropertyonaComboBoxdoyousetwithacolumnname,priortosettingtheDataSource,todisplaydatainthecombobox?

datatext

datavalue

43.Howisapropertydesignatedasread-only?

get

44.Whichcontrolwouldyouuseifyouneededtomakesurethevaluesintwodifferentcontrolsmatched?

comparefiledvalidator

45.TrueorFalse:

TotestaWebserviceyoumustcreateawindowsapplicationorWebapplicationtoconsumethisservice?

no

46.Howmanyclassescanasingle.NETDLLcontain?

asmanyasuwant..

47.Whatisserialization,howitworksin.NET?

TheprimarypurposeofXMLserializationinthe.NETFrameworkistoenabletheconversionofXMLdocumentsandstreamstocommonlanguageruntimeobjectsandviceversa.SerializationofXMLtocommonlanguageruntimeobjectsenablesonetoconvertXMLdocumentsintoaformwheretheyareeasiertoprocessusingconventionalprogramminglanguages.Ontheotherhand,serializationofobjectstoXMLfacilitatespersistingortransportingthestateofsuchobjectsinanopen,standardscompliantandplatformagnosticmanner.

48.HowmanyarraytypesdoesC#provide?

Juggedarray,tablearray,…

GeneralQuestions

1.DoesC#supportmultiple-inheritance?

No. 

2.Whoisaprotectedclass-levelvariableavailableto?

Itisavailabletoanysub-class（aclassinheritingthisclass）.

3.Areprivateclass-levelvariablesinherited?

Yes,buttheyarenotaccessible. 

Althoughtheyarenotvisibleoraccessibleviatheclassinterface,theyareinherited. 

4.Describetheaccessibilitymodifier“protectedinternal”.

Itisavailabletoclassesthatarewithinthesameassemblyandderivedfromthespecified 

baseclass. 

5.What’sthetop.NETclassthateverythingisderivedfrom?

System.Object. 

6.Whatdoesthetermimmutablemean?

Thedatavaluemaynotbechanged. 

Note:

Thevariablevaluemaybechanged,buttheoriginalimmutabledatavaluewasdiscardedandanewdatavaluewascreatedinmemory. 

7.What’sthedifferencebetweenSystem.StringandSystem.Text.StringBuilderclasses?

System.Stringisimmutable. 

System.StringBuilderwasdesignedwiththepurposeofhavingamutablestringwhereavarietyofoperationscanbeperformed. 

8.What’stheadvantageofusingSystem.Text.StringBuilderoverSystem.String?

StringBuilderismoreefficientincaseswherethereisalargeamountofstringmanipulation. 

Stringsareimmutable,soeachtimeastringischanged, 

anewinstanceinmemoryiscreated. 

9.CanyoustoremultipledatatypesinSystem.Array?

10.What’sthedifferencebetweentheSystem.Array.CopyTo（）andSystem.Array.Clone（）?

TheClone（）methodreturnsanewarray（ashallowcopy）objectcontainingalltheelementsintheoriginalarray. 

TheCopyTo（）methodcopiestheelementsintoanotherexistingarray. 

Bothperformashallowcopy. 

Ashallowcopymeansthecontents（eacharrayeleme