专业技术中级资格嵌入式系统设计师基础知识2008年下半年嵌入式系统设计师上午试卷（B）

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• 61● Internet上的DNS服务器中保存有 （70） 。

  A.主机名

  B.域名到IP地址的映射表

  C.所有主机的MAC地址

  D.路由表

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• 62● It should go without saying that the focus of UML is modeling. However, what thatmeans, exactly, can be an open-ended question. （71）is a means to capture ideas, relationships,decisions, and requirements in a well-defined notation that can be applied to many differentdomains. Modeling not only means different things to different people, but also it can usedifferent pieces of UML depending on what you are trying to convey. In general, a UML modelis made up of one or more （72）. A diagram graphically represents things, and the relationshipsbetween these things. These （73）can be representations of real-world objects, pure softwareconstructs, or a description of the behavior of some other objects. It is common for an individualthing to show up on multiple diagrams; each diagram represents a particular interest, or view, ofthe thing being modeled. UML 2.0 divides diagrams into two categories: structural diagramsand behavioral diagrams. （74）are used to capture the physical organization of the things inyour system, i.e., how one object relates to another. （75）focus on the behavior of elements in asystem. For example, you can use behavioral diagrams to capture requirements, operations, andinternal state changes for elements.

  A.Programming

  B.Analyzing

  C.Designing

  D.Modeling

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