单选题A developer is designing the presentation tier for a web application that relies on a complex session bean.The session bean is still being developed and the APIs for it are NOT finalized. Any changes to the sessionbean API directly impacts the developm

第1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2题：

在升级ONU的固件时候，最好的升级次序是（）

• A、boot app web per
• B、app bootper web
• C、web per app boot
• D、boot app per web

第3题：

A Company.com developer is designing the presentation tier for a web application that relies on a complex session bean. The session bean is still being developed and the APIs for are NOT finalized. Any changes to the session bean API directly impacts the development of the presentation tier.  Which design pattern provides a means to manage the uncertainty in the API？（）

• A、 View Helper
• B、 Front Controller
• C、 Composite View
• D、 Intercepting Filter
• E、 Business Delegate
• F、 Chain of Responsibility

第4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

第5题：

A developer is designing a web application that makes many fine-grained remote data requests for each client request. During testing， the developer discovers that the volume of remote requests significantly degrades 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

第6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7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8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9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

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 design pattern provides a solution for this problem？（　）

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