Chapter 6 Review Questions
Tools for consolidating, analyzing, and providing access to vast amounts of data to help users make better business decisions are known as:
Business intelligence
Access is a:
DBMS for desktop PC systems
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?
Data dictionary
Which of the following allows users to add, change, delete, or retrieve data in a database?
Data manipulation language
Which of the following statements about data warehouses is not true?
Data warehouse systems provide easy-to use tools for managers to easily update data.
Which of the following is an example of a company whose business model is based on access to large databases through the web?
What is the first step you should take in managing data for a firm?
Identify the data needed to run the business.
Common data quality problems include all of the following except:
Internet connectivity problems
Which of the following best describes the importance of creating an accurate data model for your business's database?
It is critical, as without one, your data may be inaccurate, incomplete, or difficult to retrieve
MongoDB and SimpleDB are both examples of:
NoSQL databases
Which of the following database types would be best suited for storing multimedia?
Non-relational DBMS
Which of the following enables users to view the same data in different ways using multiple dimensions?
OLAP
You are working in the IT department of a small paper supply company and planning a new database that monitors employee benefits and productivity. What would be the relationship you need to establish between Employee_ID in the Employee table and Parking_spot_number in the Perks table?
One-to-one
Which of the following is the type of logical database model that treats data as if they were stored in two-dimensional tables?
Relational DBMS
What are the relationships that the relational database is named for?
Relationships between entities.
Which of the following is the most prominent data manipulation language today?
SQL
All of the following are tools or technologies for extracting information from unstructured data sets except:
SQL queries
What is the purpose of a DBMS's data definition function?
Structuring the database
Which of the following best illustrates the relationship between entities and attributes?
The entity CUSTOMER with the attribute ADDRESS
Which of the following would you use to find out which websites with content related to database design were the most often linked to by other websites?
Web structure mining
Which of the following would you use to find patterns in user interaction data recorded by web servers?
Web usage mining
Pre-configured hardware-software systems that use both relational and non-relational technology optimized for analyzing large datasets are referred to as:
analytic platforms.
A characteristic or quality describing an entity is called an:
attribute
The smallest unit of data a computer can handle is called a:
bit
The select operation:
creates a subset consisting of all records in the file that meet stated criteria.
The project operation:
creates a subset consisting of columns in a table
A _______ is a structured survey of the accuracy and the level of completeness of the data in an information system.
data quality audit
The confusion created by ________ makes it difficult for companies to create customer relationship management, supply chain management, or enterprise systems that integrate data from different sources.
data redundancy
Detecting and correcting data in a database or file that are incorrect, incomplete, improperly formatted, or redundant is called:
data scrubbing
Within a corporate information services department, the task of establishing the physical database and its logical relations are responsibilities of the _______ function
database administration
A ______ is a dedicated computer in a client/server environment that hosts a DBMS.
database server
Data mining is more _____ than OLAP
discovery driven
DBMS typically include report-generating tools in order to:
display data in an easier-to-read-format.
A schematic of the entire database that describes the relationships in a database is called an:
entity-relationship diagram
In terms of the data relationships found by data mining, sequences refers to:
events linked over time.
Data mining is a tool for allowing users to:
find hidden relationships in data
The most basic business database is compromised of:
five tables:for customers, employees, suppliers, parts, and sales.
A one-to-one relationship between two entities is symbolized in a diagram by a line that ends:
in two short marks
A table that links two tables that have a many-to-many relationship is often called an intersection relation.
intersection relation
A data mart usually can be constructed more rapidly and at a lower cost than a data warehouse because:
it typically focuses on a single subject area or line of business.
A field identified in a record as holding the unique identifier for that record is called the:
key field
In clustering, a data mining tool will find:
new groupings within data
The process of streamlining data to minimize redundancy and awkward many-to-many relationships is called:
normalization
OLAP is a tool that enables users to:
obtain online answers to ad hoc questions in a rapid amount of time.
In terms of the data relationships found by data mining, associations refers to:
occurrences linked to a single event
Hadoop is a(n):
open-source software framework designed for distributing data-processing over inexpensive computers.
A DBMS makes the:
physical database available for different logical views.
MySQL is a :
popular open-source DBMS
Links pointing to an online document are a sign of:
popularity
The logical view of a database :
presents data as they would be perceived by end users.
A field identified in a table as holding the unique identifier of the table's records is called the:
primary key
Relational database systems use _______ to ensure that relationships between coupled tables remain consistent.
referential integrity rules
Links coming out of an online document are a sign of:
richness or variety of topics covered.
In a table for customers, the information about a single customer would reside in a single:
row
In a relational database, the three basic operations used to develop useful sets of data are:
select, project, and join.
Businesses use _____ tools to search and analyze unstructured data sets, such as emails and memos.
text mining
In a relational database, a record is also called a:
tuple
A data _______ stores current and historical data of potential interest to decision makers throughout the company.
warehouse
A one-to-many relationship between two entities is symbolized in a diagram by a line that ends:
with a crow's foot preceded by a short mark.
