MIS Chapter 6
38) The logical and physical views of data are separated in a DBMS. A) TRUE B) FALSE
A
55) All of the following are technologies used to analyze and manage big data except: A) cloud computing. B) noSQL. C) in-memory computing. D) analytic platforms. E) Hadoop.
A
58) OLAP enables: A) users to obtain online answers to ad-hoc questions in a rapid amount of time. B) users to view both logical and physical views of data. C) programmers to quickly diagram data relationships. D) programmers to normalize data. E) users to quickly generate summary reports.
A
6) Data ________ occurs when the same data is duplicated in multiple files of a database. A) redundancy B) repetition C) independence D) partitions E) discrepancy
A
10) A record is a characteristic or quality used to describe a particular entity. A) TRUE B) FALSE
B
30) Which of the following is a specialized language that programmers use to add and change data in the database? A) Data access language B) Data manipulation language C) Structured query language D) Data definition language
B
32) DBMSs typically include report generating tools in order to: A) retrieve and display data. B) display data in an easier-to-read format. C) display data in graphs. D) perform predictive analysis. E) analyze the database's performance.
B
45) Relational DBMSs use key field rules to ensure that relationships between coupled tables remain consistent. A) TRUE B) FALSE
B
9) The fact that a traditional file system cannot respond to unanticipated information requirements in a timely fashion is an example of which of the following issues with traditional file systems? A) Program-data dependence B) Lack of flexibility C) Poor security D) Lack of data sharing E) Data redundancy
B
18) A(n) ________ represent data as two-dimensional tables. A) non-relational DBMS B) mobile DBMS C) relational DBMS D) hierarchical DBMS E) object-oriented DBMS
C
24) In a relational database, the three basic operations used to develop useful sets of data are: A) select, project, and where. B) select, join, and where. C) select, project, and join. D) where, from, and join. E) where, find, and select.
C
31) Which of the following is the most prominent data manipulation language today? A) Access B) DB2 C) SQL D) Crystal Reports E) NoSQL
C
34) A schematic of the entire database that describes the relationships in a database is called a(n): A) data dictionary. B) intersection relationship diagram. C) entity-relationship diagram. D) data definition diagram. E) data analysis table.
C
36) You are creating a database to store temperature and wind data from various airports. Which of the following fields is the most likely candidate to use as the basis for a primary key in the Airport table? A) Address B) City C) Airport code D) State E) Day
C
51) Which of the following is not one of the techniques used in web mining? A) Content mining B) Structure mining C) Server mining D) Usage mining E) Data mining
C
52) You work for a retail clothing chain whose primary outlets are in shopping malls and are conducting an analysis of your customers and their preferences. You wish to find out if there are any particular activities that your customers engage in, or the types of purchases made in the month before or after purchasing select items from your store. To do this, you will want to use the data mining software you are using to do which of the following? A) Identify associations B) Identify clusters C) Identify sequences D) Classify data E) Create a forecast
C
57) Which of the following tools enables users to view the same data in different ways using multiple dimensions? A) Predictive analysis B) SQL C) OLAP D) Data mining E) Hadoop
C
60) In the context of data relationships, the term associations refers to: A) events linked over time. B) patterns that describe a group to which an item belongs. C) occurrences linked to a single event. D) undiscovered groupings. E) relationships between different customers.
C
17) Which of the following is a DBMS for desktop computers? A) DB2 B) Oracle Database C) Microsoft SQL Server D) Microsoft Access E) Microsoft Exchange
D
19) Microsoft SQL Server is a(n): A) DBMS for both desktops and mobile devices. B) Internet DBMS. C) desktop relational DBMS. D) DBMS for midrange computers. E) DBMS for mobile devices.
D
3) A characteristic or quality that describes a particular database entity is called a(n): A) field. B) tuple. C) key field. D) attribute. E) relationship.
D
50) Which of the following technologies would you use to analyze the social media data collected by a major online retailer? A) OLAP B) Data warehouse C) Data mart D) Hadoop E) DBMS
D
53) You work for a car rental agency and want to determine what characteristics are shared among your most loyal customers. To do this, you will want to use the data mining software you are using to do which of the following? A) Identify associations B) Identify clusters C) Identify sequences D) Classify data E) Create a forecast
D
8) Which of the following is a grouping of characters into a word, a group of words, or a complete number? A) File B) Table C) Entity D) Field E) Tuple
D
13) List at least three conditions that contribute to data redundancy and inconsistency. Short Answer:
Data redundancy occurs when different divisions, functional areas, and groups in an organization independently collect the same piece of information. Because it is collected and maintained in so many different places, the same data item may have: 1. different meanings in different parts of the organization, 2. different names may be used for the same item, and 3. different descriptions for the same condition. In addition, the fields into which the data is gathered may have different field names, different attributes, or different constraints.
14) Which of the following enables a DBMS to reduce data redundancy and inconsistency? A) Ability to enforce referential integrity B) Ability to couple program and data C) Use of a data dictionary D) Ability to create two-dimensional tables E) Ability to minimize isolated files with repeated data
E
16) The logical view of a database: A) displays the organization and structure of data on the physical storage media. B) includes a digital dashboard. C) allows the creation of supplementary reports. D) enables users to manipulate the logical structure of the database. E) presents data as they would be perceived by end users.
E
35) A one-to-many relationship between two entities is symbolized in a diagram by a line that ends with: A) one short mark. B) two short marks. C) three short marks. D) a crow's foot. E) a crow's foot topped by a short mark.
E
48) Identify and describe three basic operations used to extract useful sets of data from a relational database. Short Answer:
The select operation creates a subset consisting of all records (rows) in the table that meets stated criteria. The join operation combines relational tables to provide the user with more information than is available in individual tables. The project operation creates a subset consisting of columns in a table, permitting the user to create new tables that contain only the information required.
11) Program-data dependence refers to the coupling of data stored in files and the specific programs required to update and maintain those files such that changes in programs require changes to the data. A) TRUE B) FALSE
A
15) A DBMS makes the: A) physical database available for different logical views. B) relational database available for different logical views. C) physical database available for different analytic views. D) relational database available for different analytic views. E) logical database available for different analytic views.
A
21) In a relational database, a record is referred to in technical terms as a(n): A) tuple. B) table. C) entity. D) field. E) key.
A
22) A field identified in a table as holding the unique identifier of the table's records is called the: A) primary key. B) key field. C) primary field. D) unique ID. E) primary entity.
A
26) The join operation: A) combines relational tables to provide the user with more information than is otherwise available. B) identifies the table from which the columns will be selected. C) creates a subset consisting of columns in a table. D) organizes elements into segments. E) creates a subset consisting of rows in a table.
A
29) Which of the following is an automated or manual file that stores information about data elements and data characteristics such as usage, physical representation, ownership, authorization, and security? A) Data dictionary B) Data definition diagram C) Entity-relationship diagram D) Relationship dictionary E) Data table
A
33) The process of streamlining data to minimize redundancy and awkward many-to-many relationships is called: A) normalization. B) data scrubbing. C) data cleansing. D) data defining. E) optimization.
A
37) A one-to-one relationship between two entities is symbolized in a diagram by a line that ends: A) in two short marks. B) in one short mark. C) with a crow's foot. D) with a crow's foot topped by a short mark. E) with a crow's foot topped by two short marks.
A
39) Every record in a file should contain at least one key field. A) TRUE B) FALSE
A
4) A ________ is an example of pre-digital data storage that is comparable to a database. A) library card catalog B) cash register receipt C) doctor's office invoice D) list of sales totals on a spreadsheet E) schedule of due dates on a project outline
A
40) NoSQL technologies are used to manage sets of data that don't require the flexibility of tables and relations. A) TRUE B) FALSE
A
42) Complicated groupings of data in a relational database need to be adjusted to eliminate awkward many-to-many relationships. A) TRUE B) FALSE
A
43) A physical view shows data as it is actually organized and structured on the data storage media. A) TRUE B) FALSE
A
44) DBMS have a data definition capability to specify the structure of the content of the database. A) TRUE B) FALSE
A
49) The term big data refers to all of the following except: A) datasets with fewer than a billion records. B) datasets with unstructured data. C) machine-generated data (i.e. from sensors). D) data created by social media (i.e. tweets, Facebook Likes). E) data from Web traffic.
A
12) You have been asked to design a new contracts database for a small publishing company. What fields do you anticipate needing? Which of these fields might be in use in other databases used by the company? Short Answer:
Author first name, author last name, author address, agent name and address, title of book, book ISBN, date of contract, amount of money, payment schedule, date contract ends. Other databases might be an author database (author names, address, and agent details), a book title database (title and ISBN of book), and financial database (payments made).
1) Which of the following best illustrates the relationship between entities and attributes? A) The entity CUSTOMER with the attribute PRODUCT B) The entity CUSTOMER with the attribute PURCHASE C) The entity PRODUCT with the attribute PURCHASE D) The entity PRODUCT with the attribute CUSTOMER E) The entity PURCHASE with the attribute CUSTOMER
B
2) All of the following are issues with the traditional file environment except: A) data inconsistency. B) inability to develop specialized applications for functional areas. C) lack of flexibility in creating ad-hoc reports. D) poor security. E) data sharing.
B
20) In a table for customers, the information about a single customer resides in a single: A) field. B) row. C) column. D) table. E) entity.
B
23) A field identified in a record as holding the unique identifier for that record is called the: A) primary key. B) key field. C) primary field. D) unique ID. E) key attribute.
B
27) The project operation: A) combines relational tables to provide the user with more information than is otherwise available. B) creates a subset consisting of columns in a table. C) organizes elements into segments. D) identifies the table from which the columns will be selected. E) creates a subset consisting of rows in a table.
B
41) CGI is a DBMS programming language that end users and programmers use to manipulate data in the database. A) TRUE B) FALSE
B
5) ________ creates confusion that hampers the creation of information systems that integrate data from different sources. A) Batch processing B) Data redundancy C) Data independence D) Online processing E) Data quality
B
56) A household appliances manufacturer has hired you to help analyze its social media datasets to determine which of its refrigerators are seen as the most reliable. Which of the following tools would you use to analyze this data? A) Text mining tools B) Sentiment analysis software C) Web mining technologies D) Data mining software E) Data governance software
B
25) The select operation: A) combines relational tables to provide the user with more information than is otherwise available. B) creates a subset consisting of columns in a table. C) identifies the table from which the columns will be selected. D) creates a subset consisting of all records in the file that meet stated criteria. E) creates a subset consisting of rows in a table.
D
54) A data warehouse is composed of: A) historical data from legacy systems. B) current data. C) internal and external data sources. D) historic and current internal data. E) historic external data.
D
46) The small publishing company you work for wants to create a new database for storing information about all of their author contracts. What factors will influence how you design the database? Short Answer:
Data accuracy when the new data is input, establishing a good data model, determining which data is important and anticipating what the possible uses for the data will be, beyond looking up contract information, technical difficulties linking this system to existing systems, new business processes for data input and handling, and contracts management, determining how end users will use the data, making data definitions consistent with other databases, what methods to use to cleanse the data.
59) Data mining allows users to: A) quickly compare transaction data gathered over many years. B) find hidden relationships in data. C) obtain online answers to ad-hoc questions in a rapid amount of time. D) summarize massive amounts of data into much smaller, traditional reports. E) access the vast amounts of data in a data warehouse.
B
47) List and describe three main capabilities or tools of a DBMS. Short Answer:
A DBMS includes capabilities and tools for organizing, managing, and accessing the data in the database. Its most important capabilities and tools are data definition, data dictionary, and data manipulation language. The data definition capability enables a user to be able to specify the structure of the content of the database. This capability is used to create database tables and to define the characteristics of the fields in each table. The data dictionary is used to store definitions of data elements and their characteristics in the database. In large corporate databases, the data dictionary may capture additional information, such as usage; ownership; authorization; security; and the individuals, business functions, programs, and reports that use each data element. A data manipulation language, such as SQL, that is used to add, change, delete, and retrieve the data in the database. This language contains commands that permit end users and programming specialists to extract data from the database to satisfy information requests and develop applications.
28) Microsoft Access's data dictionary displays all of the following information about a field except the: A) size of the field. B) format of the field. C) description of the field. D) type of the field. E) the organization within the organization that is responsible for maintaining the data.
E
7) Which of the following occurs when the same attribute in related data files has different values? A) Data redundancy B) Data duplication C) Data dependence D) Data discrepancy E) Data inconsistency
E
