Q1.这句话我看不懂意思? Information hiding makes the details inaccesible at a lower level during the design of the higher levels. Q2.which statement is incorrect?(我只知道a选项不是答案XDrz..) a.File extension is part of the file name which indicates teh file type. b.Each open file has a current file or pointer indicating the position where the next read or write operation should occur. c.Disk caching improves system speed by taking advantages of the greater transfer rate of data within RAM. d.Direct file access reads and writes data from or to a file in a linear order (这个选项我不懂 什麽是线性顺序linear order?查过kimo没找到^^") e.Multitasking allows several application programs to be loaded in RAM at one time. Q3.which language is popularly supported ny most major datanase system to query data?(是SQL吧?) a.SQL b.html c.DDL d.Excel e.XML Q4.Which statement is not an advantage of a database? (我确定非答案的只有e) a.Provide a database engine efficiently to access and modify the database. b.Eliminate most redundant data in the database. c.Include database schema to provide the logical view of the data in the database. d.Discover relationships and global patterm that exist among datahases, and apply these patterns to assist in management decision. e.Allow more then one user to access the data simultaneously without accidentally corrupting the data. Q5.Which statement is incorrect about the object-oriented language? a.A class describes a group of objects with similar properties and behavior. b.Inheritance separates the properties of logical data and actions from the implementation details. -- 不懂的事永远比懂的多XD <签名档I> --

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