问答题

Whichthe threearetrueaboutservletfilters？（）

A.Afiltermustimplementthedestroymethod
B.AfiltermustimplementthedoFiltermethod
C.Aservletmayhavemultiplefiltersassociatedwithit
D.Aservletthatistohaveafilterappliedtoitmustimplementthejavax.servlet.FilterChaininterface
E.AfilterthatispartofafilterchainpassescontroltothenextfilterinthechainbyinvokingthefilterChainforwardmethod
F.Foreachelementinthewebapplicationdeploymentdescriptor，multipleinstancesofafiltermaybecreatedbythewebcontainer

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YouwanttocreateavaliddirectorystructureforyourJavaEEwebapplication，andyourapplicationusestagfilesandaJARfile.WhichthreemustbelocateddirectlyinyourWEB－INFdirectory（NOTinasubdirectoryofWEB－INF）？（）

A.TheJARfile
B.Adirectorycalledlib
C.Adirectorycalledtags
D.AdirectorycalledTLDs
E.Adirectorycalledclasses
F.AdirectorycalledMETA-INF

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Whichthe twoarereservedwordsinJava？（）

A.run
B.import
C.default
D.implement