Which statement， at line 16， retrieves an InputStream for the file /WEBINF/ nyresrc.bin（）？

多项选择题Which three can be placed at line 23 to retrieve an existing HttpSession object？（）

A. HttpSession session = request.getSession（）；
B. HttpSession session = request.getSession（id）；
C. HttpSession session = request.getSession（true）；
D. HttpSession session = request.getSession（false）；
E. HttpSession session = request.getSession（“jsessionid”）

单项选择题AdeveloperfortheCompany.comwebsitehasbeentoldthatusersmayturnoffcookiesupportintheirbrowsers.Whatmustthedeveloperdotoensurethatthesecustomerscanstillusethewebapplication？（）

A. The developer must ensure that every URL is properly encoded using the appropriate URL rewriting APIs
B. The developer must provide an alternate mechanism for managing sessions and abandon theHttpSession mechanism entirely
C. The developer can ignore this issue. Web containers are required to support automatic URL rewriting when cookies are not supported
D. The developer must ass the string ？id= to the end of every URL to ensure that the conversion with the browser can continue.

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