Files 5 quizzes-mis_311_quiz2

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Files 5 quizzes-mis_311_quiz2

  1. 1. Practice Quiz TRUE/FALSE Indicate whether the sentence or statement is true or false.__T__ 1. Relations are related to each other by sharing a common entity characteristic.__T__ 2. A relational DBMS is a single data repository in which data independence is maintained.__T__ 3. An entity is a person, place, or thing about which data are to be collected and stored.__F__ 4. A model is an exact representation of a real-world event.__F__ 5. A data model is built out of tables, rows, and columns.__F__ 6. Business rules are policies written in the employee handbook.___T_ 7. Business rules help you determine the relationships that exist between entities.___F_ 8. Many-to-many relationships are easily represented using a hierarchical model.___T_ 9. One of the advantages of the hierarchical model is the ease of maintaining data integrity.___F_ 10. Hierarchal databases became popular in the 1980s.___F_ 11. The only relationship type supported by the hierarchical model is 1:1.___F_ 12. The hierarchical model was the first to define a standard DML and DDL.___T_ 13. The most important advantage of an RDBMS is the ability to let the designer operate in a human logical environment.___F_ 14. Only 1:M and M:N relationships can be represented in a relational schema.___T_ 15. Ad hoc query capability was introduced in the relational model. MULTIPLE CHOICE Identify the letter of the choice that best completes the statement or answers the question.__D__ 16. A relational database is a group of ____. a. common fields c. records b. field values d. tables_B__ 17. A table is a matrix consisting of a series of row and column ____. a. links c. systems b. intersections d. models
  2. 2. _C__ 18. One of the advantages of a relational database model is ____. a. structural dependence c. easier database design b. conceptual complexity d. complex database design__C__ 19. Using network terminology, a relationship is called a(n) ____. a. member c. set b. owner d. table__A__ 20. The hierarchical database model is based on a ____. a. tree structure c. lack of a child segment b. lack of a parent segment d. Matrix_C___ 21. The hierarchical database model depicts a set of ____ relationships. a. M:1 c. 1:M b. 1:1 d. M:N__B__ 22. The hierarchical database is not very efficient when handling ____. a. large amounts of data c. many transactions b. few transactions d. 1:M relationships__B__ 23. The hierarchical database models ____. a. have no implementation limitations c. have very strict standards b. promote database integrity d. have a simple navigational system__D__ 24. A relational database model ____. a. does not require substantial hardware and system software overhead b. does not promote "islands of information" problems c. allows trained people to use a good system poorly d. lets the user operate in a human logical environment__A__ 25. The OODM ____. a. adds semantic content b. has standards c. has a simple navigational system d. has a low system overhead that speeds transactions__C__ 26. The network database models have a(n) ____. a. navigational system that yields simple design b. simple system that promotes efficiency c. owner/member relationship that promotes database integrity d. great deal of structural independence__A__ 27. Database models were developed to ____. a. model real-world events or conditions b. deposit data within a single file c. keep data within multiple data repositories d. allow DBMSs to maintain loose control over the database activities__A__ 28. The RDBMS ____. a. performs functions provided by the hierarchical and network DBMS system b. does not manage data structures c. allows the user/designer to ignore the logical view of the database d. does not manage the details of physical storage__C__ 29. Because an RDBMS hides the systems complexity from the user/designer, ____. a. it does not exhibit data independence b. it does not exhibit structural independence c. data management is easier
  3. 3. d. data management is very difficult__C__ 30. John is working in the customer table and needs to know what customers are located in Florida. To find the information he would ____. a. create a new table c. create a new query b. create a new form d. utilize the Database Wizard__A__ 31. Database models can be grouped into two categories: conceptual models and ____ models. a. implementation c. physical b. logical d. query__A__ 32. Each row in the relational table is known as an entity ____. a. instance c. attribute b. relationship d. model__A__ 33. In response to the increasing complexity of applications, two new data models emerged: the object-oriented data model and the ____ relational data model. a. extended c. hierarchical b. flat-file d. entity__A__ 34. The ____ model is the relational model’s challenge to the OODM. a. ERD c. hierarchical b. network d. KR__C__ 35. A way of classifying data models is by degree of ____. a. difficulty c. abstraction b. knowledge d. unification
  4. 4. Answer SectionTRUE/FALSE 1. ANS: T 2. ANS: T 3. ANS: T 4. ANS: F 5. ANS: F 6. ANS: F 7. ANS: T 8. ANS: F 9. ANS: T 10. ANS: F 11. ANS: F 12. ANS: F 13. ANS: T 14. ANS: F 15. ANS: TMULTIPLE CHOICE 16. ANS: D 17. ANS: B 18. ANS: C 19. ANS: C 20. ANS: A 21. ANS: C 22. ANS: B 23. ANS: B 24. ANS: D 25. ANS: A 26. ANS: C 27. ANS: A 28. ANS: A 29. ANS: C 30. ANS: C 31. ANS: A 32. ANS: A 33. ANS: A 34. ANS: A 35. ANS: C

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