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1 ******************************************************************** SCWCD Mock Questions : J2EE DESIGN Pattern ******************************************************************** Question No :1 A developer is designing a multi-tier web application and discovers a need to log each incoming client request. Which patterns, taken independently, provide a solution for this problem? 1. Transfer Object 2. Service Locator 3. Front Controller 4. Model-View-Controller correct is :3 Question No :2 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? 1. Flyweight 2. Transfer Object 3. Service Locator 4. Dispatcher View correct is :2 Question No :3 Which design pattern is used to call business objects? 1. Business Delegate 2. Intercepting Filter 3. Service Locator

2 4. Transfer Object Question No :4 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? 1. Business Delegate and Transfer Object 2. Business Delegate and Service Locator 3. Front Controller and Business Delegate 4. Intercepting Filter and Transfer Object correct is :2 Question No :5 A developer is designing a web application that must support multiple interfaces, including: 1 an XML web service for B2B 2 HTML for web-based clients 3 WML for wireless customers Which design pattern provides a solution for this problem? 1. Session Facade 2. Business Delegate 3. Data Access Object 4. Model-View-Controller Question No :6 Which are characteristics of the Transfer Object design pattern? 1. It increases the complexity of the design due to remote synchronization and version control issues.

3 2. It reduces network traffic by collapsing multiple remote requests into one. 3. It increases the complexity of the remote interface by removing coarse-gained methods and 2 Question No :7 Which are characteristics of the Transfer Object design pattern? 1. It reduces network traffic by collapsing multiple remote requests into one. 2. It increases the complexity of the design due to remote synchronization and version control issues. 3. Both are true 4. It increases the complexity of the remote interface by removing coarse-gained methods. correct is :3 Question No :8 Which design pattern provide "centralized controller for managing the handling of requests"? 1. Front Controller 2. Composite View 3. View Helper Explanations :Front Controller : Provides a centralized controller for managing the handling of requests Question No :9 Which design pattern "Reduces coupling between presentation tier and business services"? 1. Business Delegate 2. Service Locator 3. Transfer Object Assembler Explanations :Business Delegate Question No :10 Which design pattern "Encapsulate the business data"?

4 1. Transfer Object 2. Session Facade 3. Business Delegate 4. Value List Handler Explanations :Transfer Object : Encapsulate the business data. A single method call is used to send and retrieve the Transfer Object Question No :11 "Value Obects is an arbitrary serializable Java object " Is the above statement is true? 1. true 2. false 3. Can't say Explanations :Value Obects is an arbitrary serializable Java object Question No :12 Which design pattern connected Data Base? 1. Data Access Object 2. Transfer object 3. Value object Explanations :Data Access Object Question No :13 Which statement is true about Service Locator? 1. Multiple clients can reuse the Service Locator object to reduce code complexity 2. provide a single point of control 3. improve performance by providing a caching facility 4. All of the above Explanations :All of the above Question No :14 "facilitates preprocessing and post-processing of a request"

5 Which design pattern related to the above description? 1. Intercepting Filter 2. Front Controller 3. View Helper 4. Composite View Explanations :Intercepting Filter Question No :15 Which statement is true about Intercepting Filter design pattern? 1. Intercepting Filter intercepts incoming requests and outgoing responses, and applies a filter. 2. Filters may be added and removed in a declarative manner. 3. After pre- or post-processing is finished, the final filter in the group passes control to the original target object 4. All of the above Explanations :All of the above Distribution of this pdf is illegal without permission of techfaq360.com