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LaudonEss6_TIF_ch07 - Chapter 7 Managing Data Resources 7-1...

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Chapter 7 Managing Data Resources 7-1 Chapter 7 Managing Data Resources True-False Questions 1. The benefits of a DBMS are immediately tangible. Answer: False Difficulty: Easy Reference: p. 234 2. Excellent hardware and software will result in inefficient information systems if file management is poor. Answer: True Difficulty: Easy Reference: p. 234 3. A record describes an entity. Answer: True Difficulty: Easy Reference: p. 235 4. In traditional file processing, each functional area, by developing its own specialized applications, contributes to data redundancy and wastes resources. Answer: True Difficulty: Medium Reference: p. 236 5. A traditional file processing system cannot deliver ad hoc reports in a timely fashion. Answer: True Difficulty: Medium Reference: p. 237 6. A DBMS eliminates most of the data definition statements found in traditional programs. Answer: True Difficulty: Hard Reference: p. 238 7. A data manipulation language is usually used to replace conventional third- and fourth- generation programming languages to manipulate the data in the database. Answer: False Difficulty: Hard Reference: p. 239 8. More advanced data dictionaries are active in that related programs can automatically use changes in the dictionary. Answer: True Difficulty: Medium Reference: p. 239 9. The most popular type of DBMS today for PCs is the network DBMS. Answer: False Difficulty: Easy Reference: p. 240 10. The strength of the relational model is that it can relate data in two files if the files share a common data element. Answer: True Difficulty: Easy Reference: p. 240 11. The project operation creates a subset consisting of columns in a table. Answer: True Difficulty: Medium Reference: p. 241
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7-2 Managing Data Resources Chapter 7 12. The hierarchical model DBMS is a later version of the relational model DBMS. Answer: False Difficulty: Medium Reference: p. 243 13. Hierarchical structures are limited in that each child may have only one parent. Answer: True Difficulty: Hard Reference: p. 243 14. IBM’s IMS is a reliable hierarchical system still in use by many banks. Answer: True Difficulty: Medium Reference: p. 244 15. Conventional DBMS can easily handle graphics-based and multimedia applications. Answer: False Difficulty: Medium Reference: p. 244 16. The two design exercises primary to the design of a database are logical and physical. Answer: True Difficulty: Medium Reference: p. 244 17. The entity-relationship diagram documents the physical design of the database. Answer: False Difficulty: Medium Reference: p. 245 18. Most relational databases in use today have become fully normalized over the time during which they have been used. Answer: False Difficulty: Hard Reference: p. 246 19. Distributed systems increase the vulnerability of a central site. Answer: False Difficulty: Easy Reference: p. 247 20. Local databases can create security problems by widely distributing access to sensitive data.
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