13春学期《数据库应用系统设计》在线作业(国外英文资料).docVIP

13春学期《数据库应用系统设计》在线作业(国外英文资料) Spring semester design of database application system online Test scores: 100 test time: - test scores: 100 One, single topic (21 questions, 42 points). Score: 42 During the three stages of data management technology, the highest degree of data redundancy and data sharing is the () phase File system B. the database Manual management D. database management system Answer: B A score of 2 points: 2 The view that displays the window object and its control is () Layout view Window view The C. Properties view # script view Answer: A, A score of 2 points: 2 In order to specify the constraints that the data objects should be satisfied with when the database is determined, use () A. column constraints Static constraint Dynamic constraint Relationship constraint Answer: B A score of 2 points: 2 If the user action request violates the integrity constraints, the system () is checked by a delay check. A. reject the user B. reject the whole transaction and roll back the transaction Allow the user to operate but give prompt information Dont do anything Answer: B A score of 2 points: 2 Determine the data storage arrangement to improve system performance, which is part of the database design () phase A. conceptual design B. logical design C. physical structure design D. run and maintain Answer: C A score of 2 points: 2 Using SQL to modify the database, the correct order is () A. the CREATE DATABASE B. MODIFY the DATABASE C. the ALTER DATABASE D. CHANGE DATABASE Answer: C A score of 2 points: 2 In a database management system, you define patterns, subpatterns, and internal patterns through () language Data definition Data manipulation Data control Data management Answer: A, A score of 2 points: 2 The entry point for the PowerBuilder application is () A. the main function application Window object Transaction object Answer: B A score of 2 points: 2 The main technology for concurrency control is () A. backup Create a log file C. the blockade Integrity check