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哈尔滨理工大学 2006－2007 学年第一学期考试试题 A 卷 软件工程系 出题教师：崔香、刘欢 系主任： 第 1 页共 7页 考试科目： 数据库系统 考试时间：120 分钟 试卷总分100 分 考试班级：软件05-1、2、3、4、5、6 班 题号 I II III IV V 总分 得分 评卷教师 I、Choice Qu estions（choose ONE corresponding description from four choices for the following terms） ( 2 marks × 10 = 20 marks） 1. The relationship among Database(DB), Database System(DBS) and Database Management System(DBMS) is ___b____. A. DBMS includes DB and DBS B．DBS includes DB and DBMS C．DB includes DBS and DBMS D．DB is DBS, also as DBMS 2. In relation schemas, the relation ship among different normal forms is __c_____. A. 1NF 2NF 3NF B. 3NF 1NF 2NF C. 3NF 2NF 1NF D. 2NF 1NF 3NF 3. A collection of operations that performs a single logical function in a database application is called as _d______. A. Query language B. Query Program C. File D. Transaction 4. In database fields, we refer SQL as b________. A. Standard Query Language B. Structured Query Language C. System Query Language D. Sequence Query Language 5. Choose the only one incorrect description from the followings: ___d_____ A. Neither tuples nor attributes have order. B. Attributes can appear in any order and the relation is still the same. C. Each value in the database must be a member of some domain. D. Duplicate tuples can exist in relation. 6. Choose the only one correct expression from the followings: __c______. A. ( some)  in B. (= all)  not in C. exists r  r  Ø D. X – Y  Ø  X  Y 7. Database users are differentiated by the way they expect to interact with the system, ‘bank tellers’ belong to _d_______ from the following four kinds. A. a...