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[阿士匹灵]

Which of the following combinations (Design Pattern- Usefulness) regarding Design Patterns
Are correct?
a: Business Delegate – Reduces the coupling between presentation-tier clients and business services.
B: Data Access Object- Allows for Multiple Views using the same model.
C: MVC – Enables casier migration to different persistence storate implementations.
D: Value Object- Reduces Network Traffic


Which statement is true about session beans, but is NOT true about entity beans?
A: The bean is used as the model in an MVC design pattern.
B: State is persistent and can represent a row int a database table.
C; The bean can use a data access object to facilitate migration to CMP.
D: State represents a conversational state for a specific client.

都是选择

顺便说说答案的理由

谢谢啦