A developer for the Company.com web site has been told that users may turn off cookie support in their browsers. What must the developer do to ensure that these customers can still use the web application？（）  

单项选择题AJSPpage，current.jsp，iscreatedtodisplaythecurrentweatherreport.Theweatherreportiscontainedinaweather.htmlpagethatisrewritteneveryfiveminutes.Whichline，appearingincurrent.jsp，ensuresthatthemostrecentversionofweather.htmlisincludedwhenevercurrent.jspisreferenced？（）

A.
B.
C.
D.
E.

单项选择题What code， inserted at line 21， is called prior to a session being migrated to a different JVM assuming the web application containing MyExample is deployed in a container which supports distributed applications？（）

A. public void valueUnbound（HttpSessionEvent ev）{...}
B. public void sessionPassivated（HttpSessionEvent ev）{...}
C. public void sessionDidActivate（HttpSessionEvent ev）{...}
D. public void sessionWillPassivate（HttpSessionEvent ev）{...}

多项选择题Whichthe threearetrueaboutservletfilters？（）

A. A filter must implement the destroy method
B. A filter must implement the doFilter method
C. A servlet may have multiple filters associated with it
D. A servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain  interface
E. A filter that is part of a filter chain passes control to the next filter in the chain by invoking the filterChain forward method
F. For each  element in the web application deployment descriptor， multiple instances of a filter may be created by the web container

多项选择题Assume session is an HttpSession， and is not referenced anywhere else in ServletA. Which two changes， taken together， ensure that value is equal to “Hello” on line 23？ （）

A.A
B.B
C.C
D.D
E.E

单项选择题Given the HttpServlet code：   getServletContext（）.setAttribute（“foo”， “value”）； What is the result？（）

A. The attribute foo is placed in the application
B. A ServletContextListener registered for that servlet is notified
C. A ServletAttributeListener registered for that servlet is notified
D. An HttpSessionAttributeListener registered for that servlet is notified