单项选择题
Which interface must a class implement to be informed of a session creation event？（）
A. javax.servlet.http.HttpSessionListener B. javax.servlet.http.HttpSessionBindingListener C. javax.servlet.http.HttpSessionCreationListener D. javax.servlet.http.HttpSessionActivationListener
多项选择题 Whichthe twoareconcerningtheobjectsavailabletodeveloperscreatingtagfiles？（）
单项选择题 AssumeataghandlerextendsTagSupport.Whichisusedwithinthetaghandlertogetanattribute“foo”thatisintheapplicationscope？（）
多项选择题 Whichthe twoaboutWARfilesaretrue？（）
