单选题A developer is designing a multi-tier web application and discovers a need to log each incoming client request. Which two patterns， taken independently， provide a solution for this problem？ （）ATransfer ObjectBService LocatorCFront ControllerDIntercepti

第1题：

A developer is designing a multi-tier web application and discovers a need to hide the details of establishingand maintaining remote communications from the client. In addition， because the business and resourcetiers are distributed， the application needs to minimize the inter-tier network traffic related to servicing clientrequests. Which design patterns， working together， address these issues？（）

• A、Front Controller and Transfer Object
• B、Front Controller and Service Locator
• C、Business Delegate and Transfer Object
• D、Business Delegate and Intercepting Filter

第2题：

A developer is designing a web application which extensively uses EJBs and JMS.  The developer finds that there is a lot of duplicated code to build the JNDI contexts to access the beans and queues. Further， because of the complexity， there are numerous errors in the code.  Which J2EE design pattern provides a solution for this problem？（）

• A、 Command
• B、 Transfer object
• C、 Service locator
• D、 Session Façade
• E、 Business delegate
• F、 Data access object

第3题：

A developer has created a web application that includes a servlet for each use case in the application.These servlets have become rather difficult to maintain because the request processing methods havebecome very large. There is also common processing code in many servlets because these use cases arevery similar. Which two design patterns can be used together to refactor and simplify this web application？（）

• A、Proxy
• B、View Helper
• C、Front Controller
• D、Session Facade
• E、Business Delegate
• F、Model-View-Controller

第4题：

A developer is designing a multi-tier web application and discovers a need to log each incoming clientrequest. Which two patterns， taken independently， provide a solution for this problem？（）

• A、Transfer Object
• B、Service Locator
• C、Front Controller
• D、Intercepting Filter
• E、Business Delegate

第5题：

A developer is designing a multi-tier web application and discovers a need to log each incoming client request. Which two patterns， taken independently， provide a solution for this problem？ （）

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

第6题：

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？（）

• A、 Transfer Object
• B、 Service Locator
• C、 Intercepting Filter
• D、 Business Delegate

第7题：

A Company.com developer is designing a multi-tier web application and discovers a need to hide the details of establishing and maintaining remote communications from the client. In addition， because the business and resource tiers are distributed， the application needs to minimize the inter-tier network traffic related to servicing client requests.  Which design patterns， working together， address these issues？（）

• A、 Front Controller and Transfer Object
• B、 Front Controller and Service Locator
• C、 Business Delegate and Transfer Object
• D、 Business delegate and Intercepting Filter
• E、 Model-View-Controller and Intercepting Filter

第8题：

A developer is designing a web application that must verify for each request： The originating request is froma trusted network. The client has a valid session.The client has been authenticated. Which design pattern provides a solution in this situation？（）

• A、Transfer Object
• B、Session Facade
• C、Intercepting Filter
• D、Template Method
• E、Model-View-Controller

第9题：

A developer is designing a multi-tier application and discovers a need to hide the details of establishing and maintaining remote communications from the client. In addition， the application needs to find， in a transparent manner， the heterogeneous business components used to service the client’s requests. Which design patterns， working together， address these issues？（）

• A、 Business Delegate and Transfer Object
• B、 Business Delegate and Service Locator
• C、 Front Controller and Business Delegate
• D、 Intercepting Filter and Transfer Object
• E、 Model-View-Controller and Intercepting Filter

第10题：

A developer is designing a web application that must support multiple interfaces，including： an XML web service for B2B HTML for web-based clients WML for wireless customers. Which designpattern provides a solution for this problem？（）

• A、Session Facade
• B、Business Delegate
• C、Data Access Object
• D、Model-View-Controller
• E、Chain of Responsibility