CH 6
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 analytical views. B) relational database available for different analytical views. D) logical database available for different analytical views.
A
A field identified in a table as holding the unique identifier of the table's records is called: A) primary key B) key field C) primary field D) unique ID E) primary entity
A
A(n) ________ is an example of non-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
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
An alternative to using application server software for interfacing between a Web server and back-end databases is A) CGI. B) HTML. C) Java. D) SQL. E) NoSQL
A
An automated or manual file that stores information about data elements and data characteristics such as usage, physical representation, ownership, authorization, and security is the A) data dictionary. B) data definition diagram. C) entity-relationship diagram. D) relationship dictionary. E) Data Table
A
Big data does not refer to A) datasets with fewer than a billion records B) datasets with unstructured data C) machine-generated data D) data created by social media E) data from Web Traffic
A
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
In a relational database, a record is referred to in technical terms as a(n) A) tuple B) row C) entity D) field E) key
A
OLAP is a tool for enabling 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
A
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
The organization's rules for sharing, disseminating, acquiring, standardizing, classifying, and inventorying information is called a(n) A) information policy B) data definition file C) data quality audit D) data governance policy E) data policy
A
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
1) The relationship between entities and attributes is best illustrated by 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
A field identified in a record as holding the unique identifier for that record is called: A) primary key B) key field C) primary field D) unique ID E) key attribute
B
A household appliances manufacturer has hired you to help analyze their social media datasets to determine which of their 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 usage mining technologies D) data mining software for identifying associations E) data mining software for forecasting
B
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) analyse the database's performance.
B
Data mining is a tool for allowing 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 software
B
In a table for customers, the information about a single customer would reside in a single A) field B) row C) column D) table E) entity
B
The data dictionary serves as an important data management tool by A) assigning attributes to the data. B) creating an inventory of data contained in the database. C) presenting data as end users or business specialists would perceive them. D) maintaining data in updated form. E) providing a guide to data
B
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
The special organizational function whose responsibilities include physical database design and maintenance is called A) data administration B) database administration C) information policy administration D) data auditing E) database management
B
The specialized language programmers use to add and change data in the database is called A) a data access language. B) a data manipulation language. C) structured query language. D) a data definition language. E) a DBMS
B
The traditional file environment does not typically have a problem with A) data inconsistency. B) program-data independence. C) lack of flexibility in creating ad-hoc reports. D) poor security. E) data sharing.
B
_______ tools are used to analyze large unstructured data sets, such as e-mail, memos, survey responses, etc., to discover patterns and relationships. A) OLAP B) Text mining C) In-memory D) Clustering E) Classification
B
________ 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
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
A(n) ______ organizes data in two-dimensional tables A) non-relational DBMS B) mobile DBMS C) relational DBMS D) hierarchical DBMS E) object-oriental DBMS
C
Detecting and correcting data in a database or file that are incorrect, incomplete, improperly formatted, or redundant is called A) data auditing. B) defragmentation. C) data scrubbing. D) data optimization E) data normalization
C
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
The most prominent data manipulation language today is A) Access. B) DB2. C) SQL. D) Crystal Reports. E) NoSQL.
C
The tool that enables users to view the same data in different ways using multiple dimensions is A) predictive analysis B) SQL C) OLAP D) data mining E) Hadoop
C
Which of the following is not a method for performing a data quality audit? A) surveying entire data files B) surveying samples from data files C) surveying data definition and query files D) surveying end users about their perceptions of data quality E) surveying managers about their perceptions of data quality
C
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
You are creating a database to store temperature and wind data from national airport locations. 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
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 data mining software that is capable of A) identifying associations B) identifying clusters C) identifying sequences D) classification E) forecasting
C
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
A(n) ________ is a characteristic or quality that describes a database entity. A) field B) tuple C) key field D) attribute E) relationship
D
Data cleansing not only corrects errors but also A) establishes logical relationships between data B) structures data C) normalizes data D) enforces consistency among different sets of data E) removes duplicate data
D
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
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
D
Which common database challenge is illustrated by a person receiving multiple copies of an L.L. Bean catalog, each addressed to a slightly different variation of his or her full name? A) data normalization B) data accuracy C) data redundancy D) data inconsistency E) data duplication
D
Which of the following is not a DBMS for midrange computers? A) DB2 B) Oracle C) Microsoft SQL Server D) Microsoft Access E) Microsoft Exchange
D
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) datamart D) Hadoop E) DBMS
D
You work for an national car rental agency and want to determine what characteristics are shared among your most loyal customers. To do this, you will want to use data mining software that is capable of A) identifying associations B) identifying clusters C) identifying sequences D) classification E) forecasting
D
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
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 supplemental support D) enables users to manipulate the logical structure of the database E) presents data as they would be perceived by the end user
E
When the same attribute in related data files has different values, this is called data A) redundancy. B) duplication. C) dependence. D) discrepancy. E) inconsistency.
E
Which of the following features enables a DBMS to reduce data redundancy and inconsistency? A) enforces referential integrity B) couples program and data C) data dictionary D) two-dimensional tables E) minimizes isolated files with repeated data
E
A database record is a grouping of characters into a word, a group of words, or a complete number.
FALSE
A database server is software that handles all application operations between browser-based computers and a company's back-end business applications or databases.
FALSE
Data scrubbing is a more intensive corrective process than data cleansing
FALSE
HTML has become the preferred method of communicating with back-end databases because it is a cross-platform language
FALSE
Implementing a Web interface for an organization's internal database usually requires substantial changes to be made to the database.
FALSE
In a client/server environment, a DBMS is located on a dedicated computer called a Web server.
FALSE
In associations, a data mining tool discovers different groupings within data, such as finding affinity groups for bank cards.
FALSE
In data mining, the technique of predicting uses a series of existing values to determine what other future values will be.
FALSE
Multiple data marts are combined and streamlined to create a data warehouse
FALSE
OLAP is unable to manage and handle queries with very large sets of data
FALSE
Relational DBMSs use key field rules to ensure that relationships between coupled tables remain consistent
FALSE
The DBMS programming language that end users and programmers use to manipulate data in the database is called CGI
FALSE
A physical view shows data as it is actually organized and structured on the data storage media.
TRUE
An application that transfers information from an organization's internal database to a Web server for delivery as part of a Web page to the user is called middleware
TRUE
An attribute is a characteristic or quality used to describe a particular entity
TRUE
Complicated groupings of data in a relational database need to be adjusted to eliminate awkward many-to-many relationships
TRUE
DBMS have a data definition capability to specify the structure of the content of the database
TRUE
Databases record information about general categories of information referred to as entities
TRUE
Every record in a file should contain at least one key field
TRUE
High-speed analytic platforms use both relational and non-relational tools to analyze large datasets.
TRUE
Legacy systems are used to populate and update data warehouses
TRUE
NoSQL technologies are used to manage sets of data that don't require the flexibility of tables and relations
TRUE
The coupling of data with the software programs that manipulate the data, such that changes in programs requires changes to the data, is called program-data dependence .
TRUE
The logical and physical views of data are separated in a DBMS.
TRUE
The organizational function that is in charge of policies and procedures for managing internal data resources is called data administration.
TRUE
The policies and processes for managing the integrity and security of data in a firm are referred to as data governance
TRUE
To analyze unstructured data, such as memos and legal cases, you would use text mining tools.
TRUE
To perform multidimensional data analysis, you would use OLAP.
TRUE
With in-memory computing, a computer's primary memory (RAM) is used for processing
TRUE
You can manipulate data on a Web server by using a CGI script.
TRUE
In terms of data relationships, 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
