Database Processing, Ninth Edition
1.
Teleprocessing systems split all processing between the server and the user’s computer.
Answer: False
Page: 542
Level: moderate
2.
Teleprocessing systems generally have a graphical user interface.
Answer: False
Page: 542
Level: easy
3.
In a client-server system, there may be many database servers but each one processes a separate database.
Answer: True
Page: 543
Level: moderate
4.
In a client-server system, the server processes the application programs.
Answer: False Level: moderate
Page: 543
5.
With a file-sharing system, each user’s computer contains the DBMS.
Answer: True Level: moderate
Page: 543
6.
7.
8.
9.
A file-sharing system generates more traffic on the network than does a client-server system.
Answer: True Level: easy
Page: 544
In a partitioned, distributed database system, a vertical fragment refers to a table that is broken into two or more sets of columns.
Answer: True
Page: 546
Level: hard
A distributed database may be broken into vertical or horizontal partitions, but not both.
Answer: False
Page: 546
Level: hard
Of the different types of distributed database systems, the partitioned, replicated distributed database tends to offer the greatest flexibility.
Answer: True Level: moderate
Page: 547
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10.
The simplest type of distributed database processing is to allow multiple computers to update the data but designate one computer to resolve any conflicts.
Answer: True Level: hard
Page: 546
11.
Downloaded data are typically downloaded, updated, and uploaded back to the database.
Answer: False Level: moderate
Page: 548
12.
One potential problem with downloaded data is providing control against inconsistencies resulting from local updates.
Level: easy Answer: True
Page: 550
13.
An OLAP cube is limited to three dimensions.
Answer: False
Page: 553
Level: moderate
14.
OLAP uses extensions to SQL to define and process its data structures.
Answer: True
Page: 555
Level: hard
15.
In OLAP processing, a snowflake schema is faster but requires more storage space than a star schema.
Answer: False
Page: 558
Level: hard
16.
MOLAP is the term for the Microsoft solution to OLAP storage available in SQL Server.
Answer: False Level: moderate
Page: 559
17.
The role of the data warehouse is to store extracts of operational data and make them available to users.
Answer: True
Page: 560
Level: easy
18.
Some of the data in a data warehouse could have been purchased from other organizations.
Answer: True Level: moderate
Page: 560
19.
It is not necessary to store any metadata in the data warehouse.
Answer: False
Page: 561
Level: easy
20.
The term drill down refers to the capability of seeing the data in smaller and smaller units.
Answer: True
Page: 562
Level: moderate
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21.
All data in the data warehouse are made consistent in timing and domain in the process of extraction.
Answer: False Level: moderate
Page: 564
22.
Users generally want the capability of graphical output from a data warehouse.
Answer: True Level: easy
Page: 562
23.
The term data mart is another name for the term data warehouse .
Answer: False Level: moderate
Page: 566
24.
A data mart may contain several data warehouses.
Answer: False Level: easy
Page: 544
25.
Data are an organizational resource, as are plant, equipment, and financial assets.
Answer: True Level: easy
Page: 567
26.
Organizational data consists only of text and numeric data.
Answer: False Level: moderate
Page: 567
27.
The scope of data administration is the same as that of database administration.
Answer: False
Page: 568
Level: hard
28.
The data administration group is usually responsible for defining and maintaining the official organizational standard for all data items in the organization.
Answer: False Level: moderate
Page: 570
29.
Data administration is responsible for defining data security policies.
Answer: True
Page: 570
Level: easy
30.
In general, data administration has the responsibility to resolve conflicts between user groups concerning data needs.
Answer: True Level: easy
Page: 571
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31. Which of the following is not a type of multi-user database architecture? a.) b.) c.) teleprocessing data warehouse file-sharing d.) e.)
Level: hard
Page: 542 client-server distributed database
32. A teleprocessing system is a multi-user database architecture in which . a.) b.) dumb terminals transmit data to a centralized computer one computer processes the database, and other computers in the network process c.) d.) e.) application programs the DBMS as well as the application programs are stored on the users’ computers part or all of the database is duplicated on more than one computer parts of the database are stored on more than one computer
Level: moderate
Page: 542
33. Which of the following is characteristic of teleprocessing systems ? a.) It uses interactive graphical user interfaces. b.) All processing is performed on a single computer. c.) The DBMS is on a local computer. d.) e.)
Level: easy
Different columns of a table may reside on different computers.
All of the above.
Page: 542
34. A client-server system is a multi-user database architecture in which . a.) dumb terminals transmit data to a centralized computer b.) one computer processes the database, and other computers in the network process c.) d.) application programs the DBMS as well as the application programs are stored on the users’ computers part or all of the database is duplicated on more than one computer e.) parts of the database are stored on more than one computer
Level: moderate
Page: 543
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35. Which of the following is true of client-server systems? a.) b.)
Client-server systems make extensive use of dumb terminals.
Client-server systems only request file-level services from the server. c.) Client-server systems execute applications on the server. d.) Client-server systems may have multiple database processing servers but each one e.) processes a different database.
All of the above.
Level: hard
Page: 543
36. A file-sharing system is a multi-user database architecture in which . a.) dumb terminals transmit data to a centralized computer b.) c.) d.) e.) one computer processes the database, and other computers in the network process application programs the DBMS as well as the application programs are stored on the users’ computers part or all of the database is duplicated on more than one computer parts of the database are stored on more than one computer
Level: moderate
Page: 544
37. A partitioned system is a multi-user database architecture in which . a.) b.) dumb terminals transmit data to a centralized computer one computer processes the database, and other computers in the network process application programs the DBMS as well as the application programs are stored on the users’ computers c.) d.) e.)
Level: moderate
Page: 544-545 part or all of the database is duplicated on more than one computer parts of the database are stored on more than one computer
38. A vertical fragment or partition refers to . a.) a table that is broken into two or more sets of rows b.) a table that is broken into two or more sets of columns c.) a database downloaded in a file-sharing system d.) the data measures held constant in a data cube the data elements sliced in a data cube e.)
Level: easy
Page: 546
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39. A horizontal fragment or partition refers to . a.) b.) a table that is broken into two or more sets of rows a table that is broken into two or more sets of columns c.) d.) e.) a database downloaded in a file-sharing system the data measures held constant in a data cube the data elements sliced in a data cube
Level: easy
Page: 543
40. The greatest disadvantage of distributed databases is the . a.) b.) availability security risk c.) cost/complexity d.) difficulty of control and possible integrity problems e.) flexibility
Level: moderate
Page: 547
41. The greatest advantage of distributed databases is the . a.) b.) availability security risk c.) d.) e.) cost/complexity difficulty of control and possible integrity problems flexibility
Level: moderate
Page: 547
42. Which of the following is the simplest type of distributed database processing? a.) downloading read-only data b.) c.) d.) distributed update conflict teleprocessing allow updates on multiple computers with a single computer for conflict resolution e.) allow updates on multiple computers with multiple computers for conflict resolution
Level: moderate
Page: 547
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43. Read-only data downloaded from a distributed database processing system is called a(n)
in Oracle. a.) distributed read b.) c.) d.) e.) snapshot distributed view read view materialized view
Level: hard
Page: 547
44. Read-only data downloaded from a distributed database processing system is called a(n)
in SQL Server. a.) b.) distributed read snapshot c.) d.) e.) distributed view read view materialized view
Level: hard
Page: 547
45. Which of the following is an advantage of downloaded data? a.) b.) c.) d.) e.) data consistency is improved coordination of updating and downloading data is improved data is closer to the user less opportunity for computer crimes easier to control access to data
Level: easy
Page: 548
46. If downloading data occurs in the morning, which of the following is most likely to be true in the afternoon? a.) the organizational database is current and downloaded data are current b.) the organizational database is current and downloaded data are out of date c.) the organizational database is out of date and downloaded data are current d.) the organizational database is out of date and downloaded data are out of date e.) it depends on the method used for downloading
Level: moderate
Page: 548
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47. In an OLAP cube, the attributes on an axis are called . a.) b.) levels dimensions c.) d.) e.) measures members slices
Level: hard
Page: 553
48. The dimension(s) that are held constant in an OLAP cube are called . a.) b.) c.) d.) e.)
Level: hard
Page: 555 axes levels measures members slices
49. The values of a dimension in an OLAP cube are called . a.) b.) axes levels c.) d.) e.)
Level: hard
Page: 555 measures members slices
50. The OLAP schema in which every dimension table is adjacent to the table storing the measure values and the tables may or may not be normalized is called a(n) _____________. a.) b.) c.) d.) e.) snowflake network star tree ring
Level: moderate
Page: 558
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51. Which of the following is an OLAP storage alternative that advocates the use of both relational
DBMS products and specialized OLAP engines? a.) HOLAP b.) c.) d.) e.)
COLAP
MOLAP
ROLAP
TOLAP
Level: moderate
Page: 559
52. Which of the following OLAP storage alternatives provides the fastest performance? a.) HOLAP b.) c.)
COLAP
MOLAP d.) e.)
Level: moderate
ROLAP
TOLAP
Page: 559
53. A data warehouse is a store of enterprise data designed to . a.) support transaction processing b.) facilitate management decision making c.) hold backup files in case the system needs to be recovered d.) hold test data for developers to use when creating new applications hold old data that may be used for long-term analysis e.)
Level: easy
Page: 560
54. The term drill down means the user wants to . a.) b.) c.) summarize data get older data sort d.) get more details e.) aggregate data
Level: easy
Page: 562
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55. Data in a data warehouse may be inconsistent because of differences in the . a.) b.) attributes domains c.) d.) e.) indexes rows tables
Level: moderate
Page: 563
56. A data mart differs from a data warehouse in that the . a.) b.) c.) d.) e.) data mart has a smaller scope data mart may be restricted to a particular type of data data mart may be restricted to a particular business function data mart may be restricted to a particular business unit or location
All of the above.
Level: easy
Page: 566
57. Protecting and ensuring effective use of the entire organization’s data is the responsibility of the . a.) b.) c.) d.) e.)
Level: easy
Page: 567 office of data administration database administrator developers end users vendors
58. Which of the following is not within the function of data administration? a.) conflict resolution b.) c.) d.) data policies data standards marketing data administration services e.) All of the above are within the function of data administration.
Level: moderate
Page: 569
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59. A data proponent is in charge of . a.) b.) developers data administration c.) d.) e.) data items the database the database administrator
Level: moderate
Page: 570
60. Resolving conflicts among user groups about data is the responsibility of . a.) developers b.) data administration c.) d.) e.) data items users database administrator
Level: easy
Page: 569
61. Data administration should have a(n) ____________ attitude towards information management. a.) b.) ad hoc authoritative c.) d.) e.) managerial proactive reactive
Level: easy
Page: 571
62. A(n) teleprocessing system is a multi-user database system that uses one computer and one
CPU.
Level: moderate
Page: 542
63. A system in which one computer processes the database and other computers in the network process application programs is called a(n) client-server system.
Level: moderate
Page: 542
64. A system in which the DBMS as well as the application programs are stored on the users’ computers is called a(n) file-sharing system.
Level: moderate
Page: 543
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65. A system in which part or all of the database is duplicated on more than one computer is known as a(n) replicated distributed database system.
Level: hard
Page: 544
66. A system in which parts of the database are stored on more than one computer is known as a(n)
partitioned distributed database system.
Level: hard
Page: 546
67. A(n) vertical fragment refers to a table that is broken into two or more sets of columns.
Level: moderate
Page: 546
68. A(n) horizontal fragment refers to the rows of a table when they are divided into pieces.
Level: moderate
Page: 546
69. SQL Server uses the term snapshot to refer to read-only data that has been downloaded.
Level: hard
Page: 547
70. Downloaded read-only data that is sent to multiple computers for processing is referred to as
materialized views by Oracle.
Level: hard
Page: 547
71. To address the problem of providing atomic transactions in a distributed environment, an algorithm called two-phased commit is used to provisionally commit updates pending notification from the distributed transaction manager.
Level: moderate
Page: 548
72. Downloaded data typically cannot be updated because once they are removed from the operational database they are no longer subject to concurrency control .
Level: easy
Page: 548
73. When a user changes downloaded data, the data is no longer consistent with the corporate database and also with other users who have downloaded the data.
Level: easy
Page: 551
74. Downloading creates problems with access control , meaning it necessitates placing restrictions on which data each employee may create, delete, read, or update.
Level: moderate
Page: 551
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75. Since OLAP places no limits on the number of axes an OLAP cube can have, the term OLAP
hypercube is sometimes used instead of “cube.”
Level: easy
Page: 553
76. Both the columns and the rows of an OLAP cube are called axes .
Level: moderate
Page: 553
77. The attributes that appear on an axis of an OLAP cube are called dimensions of the cube.
Level: hard
Page: 553
78. The cells of an OLAP cube represent the measures of the cube, which are the data values to be displayed.
Level: moderate
Page: 553
79. The values of a dimension of an OLAP cube are called members .
Level: hard
Page: 555
80. The position of a dimension in its hierarchy is called its level .
Level: moderate
Page: 555
81. An OLAP star schema has every dimension table adjacent to the table storing the measure values and the tables may or may not be normalized.
Level: hard
Page: 558
82. An OLAP snowflake schema can have multilevels of tables and all the tables will be normalized.
Level: hard
Page: 558
83. ROLAP is an OLAP storage alternative that uses relational DBMS products.
Level: easy
Page: 559
84. A(n) data warehouse is a store of enterprise data that is designed to facilitate management decision making.
Level: easy
Page: 560
85. Getting more detailed information, or disaggregating, from a data warehouse is called drilling down .
Level: easy
Page: 562
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86. Summarizing or grouping data is known as data aggregation .
Level: easy
Page: 562
87. Ad hoc queries are those that are not of a regular, recurring, pre-planned nature.
Level: moderate
Page: 566
88. A(n) data mart is a facility like a data warehouse but for a much smaller domain.
Level: easy
Page: 566
89. Data are an important organizational asset, as are plant, equipment, and financial assets.
Level: easy
Page: 567
90. The scope of the office of data administration is the entire organization .
Level: moderate
Page: 567
91. A(n) data proponent is the organizational unit in charge of managing the standard for a specific data item.
Level: moderate
Page: 570
92. The office of data administration must have a(n) proactive attitude toward information management.
Level: moderate
Page: 571
93. Distinguish among teleprocessing systems, file-sharing systems, client-server systems, and distributed database systems.
Teleprocessing systems perform all database and application processing on a single computer with the use of a dumb terminal to display results to the user. File-sharing systems place the database on a shared storage device, but all database and application processing take place on the user’s computer. Client-server systems split the processing between the client and the server.
In this architecture, the server processes the database and the client processes the application.
Finally, the distributed database system processes the application on the client computer, and distributes the processing of a single database among a number of different database servers.
94. Briefly describe the different types of distributed database systems and the continuum of advantages and disadvantages.
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The different types of systems – nonpartitioned/nonreplicated databases, partitioned/nonreplicated databases, nonpartitioned/replicated databases, and partitioned/replicated databases – create a continuum. A partitioned database has tables or parts of tables split up across a number of different sites. A replicated database has copies of tables or parts of tables spread across a number of different sites. Along the continuum of distributed databases, systems toward the nonpartitioned/nonreplicated database end are the least flexible, provide the least data availability, and the least independence. Systems on the partitioned/replicated database end have the highest cost, pose the greatest security risks, and are the most difficult to control.
95. Briefly describe the three distributed processing techniques.
The simplest type of distributed processing is the download of read-only data. This downloaded data can be used for queries and reports only. The next type of distributed processing is to allow multiple computers to make requests to update data, but a single computer within the system performs all of the actual update processing. With this technique, updated data is periodically forwarded back to all of the distributed systems to synchronize the databases. Finally, a distributed processing alternative is to allow multiple computers to handle the update processing.
In this case, a single computer is designated to resolve conflicts that may arise.
96. Distinguish among ROLAP, MOLAP, and HOLAP.
ROLAP, MOLAP, and HOLAP describe alternative methods for OLAP storage. ROLAP, or relational OLAP, is the application of traditional relational DBMS technology to OLAP storage.
MOLAP, or multidimensional OLAP, is the development of specially designed engines to handle the specific requirements of OLAP. HOLAP, or hybrid OLAP, is the use of both relational DBMS products and specially designed OLAP engines. ROLAP takes advantage of existing technologies and uses the least storage, but provides the slowest performance. MOLAP provides the fastest performance but requires the most storage. HOLAP is a compromise between ROLAP and
MOLAP and provides fast performance for high-level processing but is slower on detail processing.
97. Distinguish between data warehouses and data marts.
The primary difference between data warehouses and data marts is one of scope. Data warehouses have an organization-wide scope. Data marts are more restrictive. Data marts can be restricted to a specific type of data, a specific business function, or a specific business unit or geographic location. The smaller scope of data marts simplifies several issues regarding data inconsistencies and management.
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