You have built a web application that you license to small businesses. The webapp uses a context
parameter， called licenseExtension， which enables certain advanced features based on your client’s licensepackage. When a client pays for a specific service， you provide them with a license extension key that theyinsert into the  of the deployment descriptor. Not every client will have this contextparameter so you need to create a context listener to set up a default value in the licenseExtensionparameter.
Which code snippet will accomplish this goal？（）

单项选择题You have a simple web application that has a single Front Controller servlet that dispatches to JSPs togenerate a variety of views. Several of these views require further database processing to retrieve the necessary order object using the orderID request parameter. To do this additional processing， you pass therequest first to a servlet that is mapped to the URL pattern  WEB INF retreiveOrder.do in the deploymentdescriptor. This servlet takes two request parameters， the orderID and the jspURL. It handles the databasecalls to retrieve and build the complex order objects and then it dispatches to the jspURL. Which codesnippet in the Front Controller servlet dispatches the request to the order retrieval servlet？（）

A.
B.
C.
D.

多项选择题You are designing an n-tier Java EE application. You have already decided that some of your JSPs willneed to get data from a Customer entity bean. You are trying to decide whether to use a Customer stubobject or a Transfer Object. Which two statements are true？（）

A.The stub will increase network traffic.
B.The Transfer Object will decrease data staleness.
C.The stub will increase the logic necessary in the JSPs.
D.In both cases， the JSPs can use EL expressions to get data.
E.Only the Transfer Object will need to use a Business Delegate.

单项选择题A developer is designing the presentation tier for a web application which requires a centralized requesthandling to complete common processing required by each request. Which design pattern provides asolution to this problem？（）

A.Remote Proxy
B.Front Controller
C.Service Activator
D.Intercepting Filter
E.Business Delegate

多项选择题Inann-tierapplication，whichtwoinvocationsaretypicallyremote，notlocal？（）

A.JSP to Transfer Object
B.Service Locator to JNDI
C.Controller to request object
D.Transfer Object to Entity Bean
E.Controller to Business Delegate

单项选择题A developer is designing a web application that makes many fine-grained remote data requests for eachclient request. During testing， the developer discovers that the volume of remote requests significantlydegrades performance of the application. Which design pattern provides a solution for this problem？（）

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