问答题

Uponauser’sfirstvisittothewebsite，whichtwooperationsarealwaysperformedwhenthegetSessionmethodiscalledwithnoargumentsinaservlet？（）

A.AllURLsreturnedbytheserverarerewritten.
B.AnHttpSessionobjectiscreatedifnecessary.
C.Theusernameandpasswordoftheuserarechecked.
D.ThesessionIDisstoredintheHTTPresponseasacookie.

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问答题

Whichthe twoaboutWARfilesaretrue？（）

A.WARfilesmustbelocatedinthewebapplicationlibrarydirectory.
B.WARfilesmustcontainthewebapplicationdeploymentdescriptor.
C.WARfilesmustbecreatedbyusingarchivetoolstodesignedspecificallyforthatpurpose.
D.ThewebcontainermustservethecontentofanyMETA-INFdirectorylocatedinaWARfile.
E.ThewebcontainermustallowaccesstoresourcesinJARsinthewebapplicationlibrarydirectory

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AwebapplicationallowstheHTMLtitlebannertobesetusingaservletcontextinitializationparametercalledtitleStr.Whichtwoproperlysetthetitleinthisscenario？（）

A.<title>${titleStr}</title>
B.<title>${initParam.titleStr}</title>
C.<title>${params[0].titleStr}</title>
D.<title>${paramValues.titleStr}</title>
E.<title>${initParam[’titleStr’]}</title>