<p>IST 331 Exam 1 Spring 2004 V. Matos</p><p>True-False Questions</p><p>1. The purpose of a database is to help people keep track of things.</p><p>2. Using lists to store data can result in data inconsistency problems.</p><p>3. Using lists to store data can result in data deletion problems.</p><p>4. Using lists to store data will not result in data addition problems.</p><p>5. Breaking a data list into pieces with a single "theme" or purpose is done using a process called table making.</p><p>6. A properly constructed database can be described as a list that has been broken up into a group of pieces, each of which is called a table.</p><p>7. When a properly constructed database is constructed by breaking a list into an appropriate group of pieces, many of the problems associated with lists are solved.</p><p>8. In order to connect the tables in a database, each row in each table must be identified by a table name</p><p>9. A column that contains a unique identifier for the rows of its own table is called a key.</p><p>10. A column that contains an identifier for the rows of another table in the database is called a global key.</p><p>11. It is the job of a program called a database management system to store and retrieve data in the database tables.</p><p>12. The industry standard supported by all major DBMSs that allows tables to be joined together is called Sequential Query Language.</p><p>13. In a database processing system, a database application interacts with the DBMS.</p><p>14. In a database processing system, a database application accesses the database data.</p><p>15. In a database processing system, the database application creates queries.</p><p>16. In a database processing system, forms are processed by the user.</p><p>17. In database processing systems, business users interact directly with database applications, which directly access the database data.</p><p>18. In database processing systems, business users interact directly with the DBMS,</p><p>1-1 which directly accesses the database data.</p><p>19. In database processing systems, business users interact directly with database applications that interact with the DBMS, which directly accesses the database data.</p><p>20. In a database processing system, the DBMS processes queries.</p><p>21. In a database processing system, rules are processed by the database management system (DBMS).</p><p>22. A rule that prevents data from being written in one table unless appropriate related data already exists in another table is called a referential integrity constraint.</p><p>23. The description of a database’s structure that is stored within the database itself is called the “metadata.”</p><p>24. A database is called “self-describing” because it reduces data duplication.</p><p>25. In a database processing system, stored procedures are held by the database management system (DBMS).</p><p>26. An index can be used to improve the performance of the database.</p><p>27. When the structure of a data entry form or a report is part of a database, it is called application metadata.</p><p>28. Multi-user databases are less complicated than single-user databases because the work is distributed to many people.</p><p>29. Multi-user databases are more complicated than single-user databases because they must prevent one user’s work from interfering with another’s.</p><p>30. Large organizational databases were the first applications of database technology.</p><p>Multiple choice </p><p>31. Which of the following is a problem of lists that is solved by using a database? a.) data inconsistencies b.) problems adding data c.) problems deleting data d.) missing data e.) All of the above.</p><p>32. In order to connect the tables in a database, each row in each table must be identified by a(n) ______. a.) table name b.) column name c.) unique identifier d.) common identifier </p><p>1-2 e.) global identifier</p><p>33. A column that contains a unique identifier for the rows of its own table is called a(n) ______. a.) joiner b.) relationship c.) key d.) foreign key e.) global key</p><p>34. A column that contains an identifier for the rows of another table in the database is called a(n) ______. a.) joiner b.) relationship c.) key d.) foreign key e.) global key</p><p>35. A program whose job is to store and retrieve user data in the database is called the ______. a.) Database Modeling System b.) Database Management System c.) Data Business Model System d.) Relational Model Manager e.) Data Business Management Service</p><p>36. The industry standard supported by all major DBMSs that allows tables to be joined together is called ______. a.) SQL - Sequential Query Language b.) SQL - Structured Question Language c.) SQL - Structured Query Language d.) RQL - Relational Question Language e.) RQL - Relational Query Language</p><p>37. Which of the following are basic components of a database system? a.) the user b.) the database application c.) the database management system (DBMS) d.) the database e.) All of the above.</p><p>38. In a database processing system . a.) the database application(s) interact(s) with the DBMS b.) the database application(s) access(es) the database data c.) the DBMS accesses the database data d.) a and b e.) a and c</p><p>39. In a database processing system, the database application . a.) creates tables</p><p>1-3 b.) creates queries c.) creates reports d.) a and b e.) b and c</p><p>40. In a database processing system, forms are processed by . a.) the user b.) the database application c.) the database management system (DBMS) d.) the database e.) All of the above.</p><p>True False</p><p>41. E-R models are expressed using a single standardized set of universally accepted symbols.</p><p>42. A schema is a representation of something of interest to the modeler.</p><p>43. An internal schema is a representation of how users view the database.</p><p>44. A conceptual schema is a complete logical view of the database.</p><p>45. An implementational schema shows physical storage using a particular product or technique.</p><p>46. An entity is something in the users’ work environment that the users want to track.</p><p>47. Entities of a given type are grouped into entity classes.</p><p>48. An entity class is described by the structure of the entities in that class.</p><p>49. An entity instance of an entity class is the representation of a particular entity and is described by the values of the attributes of the entity.</p><p>50. In E-R modeling, entities within an entity class may have different attributes.</p><p>51. In E-R modeling, an attribute may be either composite or multi-value, but it cannot be both.</p><p>52. An identifier of an entity instance must consist of one and only one attribute.</p><p>53. A “composite identifier” is defined as a composite attribute that is an identifier.</p><p>54. An identifier may be either unique or non-unique.</p><p>55. E-R modeling recognizes both relationship classes and relationship instances.</p><p>56. Relationships do not have attributes.</p><p>57. A single relationship class involves only one entity class.</p><p>1-4 58. A binary relationship is a relationship based on numerical entity instance identifiers.</p><p>59. The degree of a relationship is expressed as the relationship’s maximum cardinality.</p><p>60. A relationship’s minimum cardinality indicates whether or not an entity must be involved in the relationship.</p><p>61. Relationships among instances of a single entity class are called redundant relationships.</p><p>62. A weak entity is an entity that cannot exist in the database without (and is logically dependent upon) another type of entity also existing in the database.</p><p>63. ID-dependent entities are a common type of weak entity.</p><p>64. All weak entities must have a minimum cardinality of 1 on the entity on which it depends.</p><p>65. Multi-value attributes are represented in E-R diagrams by creating a new weak entity to represent the multi-value attribute and creating a 1:N relationship.</p><p>66. Subtype entities are used to produce a closer-fitting model when an entity has sets of optional attributes.</p><p>67. Entities with an IS-A relationship should have the same identifier.</p><p>68. Inheritance in a generalization hierarchy means that the supertype entity inherits all the attributes of the subtype entity.</p><p>ORDER CUSTOMER</p><p>69. You are given an E-R diagram with two entities, ORDER and CUSTOMER, as shown above, and are asked to draw the relationship between them. If a given customer can place a maximum of many orders and a given order can be placed by at most one customer, which of the following should be indicated in the relationship symbol between the two entities? a.) 0:1 b.) 1:1 c.) 0:N d.) N:1 e.) N:M</p><p>70. For a relationship to be considered a binary relationship it must satisfy which of the following conditions? a.) It must involve exactly two entity classes. b.) It must have a maximum cardinality of 1:1. c.) It must have a maximum cardinality of 1:N. d.) Both a and b e.) Both a and c</p><p>1-5</p>