单项选择题
A.Create an HttpSessionListener class and implement the sessionInitialized method with that block ofcode.
B.Create an HttpSessionActivationListener class and implement the sessionCreated method with thatblock of code.
C.Create a Filter class， call the getSession（false） method， and if the result was null， then execute that block of code.
D.Create an HttpSessionListener class and implement the sessionCreated method with that block of code.
单项选择题 Whatisthepurposeofsessionmanagement？（）
多项选择题 A web application contains a tag file called beta.tag in /WEB-INF/tags/alpha. A JSP page called sort.jspexists in the web application and contains only this JSP code： 1.<%@ taglib prefix="x" 2.tagdir="/WEB-INF/tags/alpha" %> 3.<x：beta /> The sort.jsp page is requested. Which two are true？（）
单项选择题 Assume a JavaBean com.example.GradedTestBean exists and has two attributes. The attribute name is oftype java.lang.String and the attribute score is of type java.lang.Integer. An array of com.example. GradedTestBean objects is exposed to the page in a request- scoped attribute called results. Additionally，an empty java.util.HashMap called resultMap is placed in the page scope. A JSP page needs to add the firstentry in results to resultMap， storing the name attribute of the bean as the key and the score attribute of thebean as the value. Which code snippet of JSTL code satisfies this requirement？（）