Squeaky Beans Inc. hired an outside consultant to develop their web application. To finish the job quickly， the consultant created several dozen JSP pages that directly communicate with the database. The Squeaky business team has since purchased a set of business objects to model their system， and the Squeaky developer charged with maintaining the web application must now refactor all the JSPs to work with the new system. 
Which pattern can the developer use to solve this problem？（）

单项选择题Adeveloperisdesigningawebapplicationthatmakesmanyfine-grainedremotedatarequestsforeachclientrequest.Duringtesting，thedeveloperdiscoversthatthevolumeofremoterequestssignificantlydegradesperformanceoftheapplication.Whichdesignpatternprovidesasolutionforthisproblem？（）

A. Flyweight
B. Transfer Object
C. Service Locator
D. Dispatcher View
E. Business Delegate
F. Model-View-Controller

单项选择题Adeveloperisdesigningamulti-tierwebapplicationanddiscoversaneedtologeachincomingclientrequest.Whichtwopatterns，takenindependently，provideasolutionforthisproblem？（）

A. Transfer Object
B. Service Locator
C. Front Controller
D. Intercepting Filter
E. Business Delegate
F. Model-View-Controller

单项选择题Which is the correct web application deployment descriptor element for defining a servlet initialization parameter？（）

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

单项选择题ServletAreceivesarequestthatitforwardstoservletBwithinanotherwebapplicationinthesamewebcontainer.ServletAneedstosharedatawithservletBandthatdatamustnotbevisibletootherservletsinA’swebapplication.InwhichobjectcanthedatathatAshareswithBbestored？（）

A. HttpSession
B. ServletConfig
C. ServletContext
D. HttpServletRequest
E. HttpServletResponse

多项选择题Forwhichthreeeventscanwebapplicationeventlistenersberegistered？（）

A. when a session is created
B. after a servlet is destroyed
C. when a session has timed out
D. when a cookie has been created
E. when a servlet has forwarded a request
F. when a session attribute value is changed