WorksheetsMIS-ch6
Total questions: 85
Worksheet time: 1hrs 16mins
1)Which of the following is an example of a pre-digital database?
A library's card-catalog
A cash register receipt
A doctor's office invoice
An SQL database
A list of sales totals on a spreadsheet
What is the first step you should take in managing data for a firm?
Cleanse the data before importing it to any database.
Audit your data quality.
Identify the data needed to run the business
Normalize the data before importing to a database
Remove redundancy.
Which of the following best illustrates the relationship between entities and attributes?
The entity PRODUCT with the attribute PURCHASE
The entity CUSTOMER with the attribute ADDRESS
The entity PRODUCT with the attribute CUSTOMER
The entity ADDRESS with the attribute CUSTOMER
The entity CUSTOMER with the attribute PRODUCT
Which of the following is the type of logical database model that treats data as if they were stored in two-dimensional tables?
Two-tiered DBMS
Pre-digital DBMS
Relational DBMS
Open source DBMS
Hierarchical DBMS
What are the relationships that the relational database is named for?
Relationships between entities
Relationships between fields and records
Relationships between rows and columns
Relationships between databases
) A characteristic or quality describing an entity is called a(n):
field
tuple
attribute
table
The most basic business database is comprised of:
three tables: for suppliers, parts, and sales
four tables: for customers, suppliers, parts, and sales.
four tables: for customers, suppliers, sales, and employees
five tables: for customers, employees, suppliers, parts, and sales.
In a table for customers, the information about a single customer would reside in a single:
row
column
entity
field
In a relational database, a record is also called a(n):
tuple
field
entity
table
A field identified in a table as holding the unique identifier of the table's records is called the:
primary field.
identifying field
primary key.
foreign key.
A field identified in a record as holding the unique identifier for that record is called the:
foreign key.
identifying field.
primary field.
key field.
A schematic of the entire database that describes the relationships in a database is called a(n):
data dictionary.
intersection relationship diagram
entity-relationship diagram
field key diagram
data definition diagram.
A one-to-one relationship between two entities is symbolized in a diagram by a line that ends
in two short marks.
in one short mark
with a crow's foot.
) with a crow's foot topped by a short mark
with a crow's foot topped by two short marks.
A one-to-many relationship between two entities is symbolized in a diagram by a line that ends
in two short marks
in one short mark
with a crow's foot.
in three short marks
with a crow's foot preceded by a short mark.
A table that links two tables that have a many-to-many relationship is often called a(n):
derived table.
intersection relation
foreign table
entity-relationship table.
derived relation
The process of streamlining data to minimize redundancy and awkward many-to-many relationships is called:
data management
data administration.
data cleansing.
data scrubbing
normalization
Which of the following best describes the importance of creating an accurate data model for your business's database?
It is not essential, as the data model itself is modified by the database continuously.
It is critical, as without one, your data may be inaccurate, incomplete, or difficult to retrieve
It is essential, as table relationships cannot be created without an accurate data model.
It is somewhat important, as the type of data model will define what kinds of data will be stored.
It is unnecessary, as a well-designed database should not require one.
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-many
One-to-one
Many-to-many
Many-to-one
Relational database systems use ________ to ensure that relationships between coupled tables remain consistent
intersection relations
one-to-one ordering
entity-relationship diagrams
foreign keys
referential integrity rules
The smallest unit of data a computer can handle is called a:
file
record
field
bit
byte
A grouping of characters into a word, a group of words, or a complete number is called a record (T=true , F=false)
True
False
Every record in a file should contain at least one key field (T=true , F=false)
T
F
A foreign key is a field that links to a separate table.
T
F
A DBMS makes the:
physical database available for different logical views.
relational database available for different physical views
physical database available for different relational views
relational database available for different analytical views
logical database available for different analytical views.
The logical view of a database:
shows how data are organized and structured on the storage media.
presents an entry screen to the user.
allows the creation of supplementary reports.
presents data as they would be perceived by end users.
shows the relationships between entities and attributes.
Which of the following allows users to add, change, delete, or retrieve data in a database?
Attribute generation
Data manipulation language
Query wizard tool
Data dictionary
Report generation tools
In a relational database, the three basic operations used to develop useful sets of data are
select, project, and where.
select, join, and where.
select, from, and join.
select, project, and join.
who, what, and where.
The select operation:
combines relational tables to provide the user with more information than is otherwise available
creates a subset consisting of columns in a table.
identifies the table from which the columns will be selected.
) specifies the content of the database.
creates a subset consisting of all records in the file that meet stated criteria.
The project operation:
combines relational tables to provide the user with more information than is otherwise available
creates a subset consisting of columns in a table.
organizes elements into segments.
identifies the table from which the columns will be selected.
stores definitions of data elements.
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?
Referential integrity module
Data definition diagram
Entity-relationship diagram
Data dictionary
Relationship dictionary
Which of the following is the most prominent data manipulation language today?
SQL
DB2
Crystal Reports
Hadoop
Access
What is the purpose of a DBMS's data definition function?
Storing and managing the data in the database
Storing definitions of data elements
Normalizing the database
Structuring the database
Ensuring consistency of relationships
Both Oracle and Microsoft Access use SQL to retrieve information from a database.
T:true
F:false
DBMS simplify how end users work with databases by separating the logical and physical views of the data.
T
F
A DBMS is special software for creating, storing, organizing, and accessing data from a database
T
F
A physical view shows data as it is organized on the storage media
T
F
End users use a data manipulation language to manipulate data in the database.
T
F
MongoDB and SimpleDB are both examples of:
open-source databases.
SQL databases.
NoSQL databases
cloud databases
Access is a:
DBMS for mainframe computers.
DBMS for mobile devices
popular open-source DBMS
DBMS for midrange computers.
DBMS for desktop PC systems.
In clustering, a data mining tool will find:
new groupings within data.
related predictions from existing values
several events grouped by time.
new associations.
forecasts for future events
MySQL is a:
DBMS for mobile devices.
popular open-source DBMS
programming language.
DBMS for desktop systems.
mainframe relational DBMS
Data mining is more ________ than OLAP.
data-focused
multidimensional
query oriented
discovery driven
streamlined
All of the following are tools or technologies for extracting information from unstructured data sets except:
sentiment analysis software.
SQL queries.
Hadoop.
a non-relational DBMS
text mining.
DBMS typically include report-generating tools in order to:
retrieve and display data.
perform predictive analysis
display data in graphs
display data in an easier-to-read-format.
display data in tables.
Which of the following database types would be best suited for storing multimedia?
SQL DBMS
Open-source DBMS
Non-relational DBMS
Cloud-based database
NoSQL DBMS
Pre-configured hardware-software systems that use both relational and non-relational technology optimized for analyzing large datasets are referred to as:
hybrid DBMS.
Hadoop.
BI.
analytic platforms.
data marts
Which of the following statements about data warehouses is not true?
A) They store supply data to be used across the enterprise for management analysis and decision making.
Data warehouse systems provide a range of ad hoc and standardized query tools, analytical tools, and graphical reporting facilities
Data warehouse systems provide easy-to-use tools for managers to easily update data.
Data warehouses make data available for anyone to access as needed.
They store supply data to be used across the enterprise for management analysis and decision making.
They may include data from website transactions.
A data mart usually can be constructed more rapidly and at lower cost than a data warehouse because:
it typically focuses on a single subject area or line of business.
all the information is historical.
it uses a web interface.
all of the information belongs to a single company.
it is open-source.
Tools for consolidating, analyzing, and providing access to vast amounts of data to help users make better business decisions are known as:
business intelligence.
OLAP
DSS
data mining.
in-memory computing
Which of the following enables users to view the same data in different ways using multiple dimensions?
Hadoop
SQL
Big data
Data mining
OLAP
OLAP is a tool that enables users to:
obtain online answers to ad hoc questions in a rapid amount of time.
view both logical and physical views of data.
quickly diagram data relationships.
normalize data.
find hidden patterns in large databases
Data mining is a tool for allowing users to:
quickly compare transaction data gathered over many years.
perform multidimensional data analysis.
obtain online answers to ad hoc questions in a rapid amount of time.
summarize massive amounts of data into much smaller, traditional reports.
find hidden relationships in data
In terms of the data relationships found by data mining, associations refers to:
events linked over time.
patterns that describe a group to which an item belongs.
occurrences linked to a single event.
undiscovered groupings.
classification when no groups have yet been defined.
In terms of the data relationships found by data mining, sequences refers to:
events linked over time.
patterns that describe a group to which an item belongs.
occurrences linked to a single event.
undiscovered groupings.
classifications when no groups have yet been defined.
Which of the following would you use to find patterns in user interaction data recorded by web servers?
Web server mining
Web usage mining
Web structure mining
Web content mining
Web protocol mining
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 usage mining
Web server mining
Web structure mining
Web content mining
Web protocol mining
Businesses use ________ tools to search and analyze unstructured data sets, such as emails and memos.
) Hadoop
web mining
text mining
OLAP
DBMS
Hadoop is a(n):
NoSQL database technology that stores both data and procedures acting on the data as objects
data mining platform designed for storing and analyzing big data produced by web communications and transactions.
open-source software framework designed for distributing data processing over inexpensive computers.
Pre-configured hardware-software system designed for analyzing big data.
high-speed platform used to analyze large data sets.
A data ________ stores current and historical data of potential interest to decision makers throughout the company
warehouse
mart
archive
mine
center
A(n) ________ is a dedicated computer in a client/server environment that hosts a DBMS.
web server
online server
database server
client server
application server
Which of the following is an example of a company whose business model is based on access to large databases through the web?
Gartner
Fortune
IBM
Microsoft
Links pointing to an online document are a sign of:
richness or variety of topics covered.
data quality.
data usage.
marketing
popularity.
Links coming out of an online document are a sign of:
richness or variety of topics covered.
popularity
data quality.
data usage.
marketing.
Web mining is the discovery of useful patterns on the web.
T
F
Most back-end databases are able to interpret HTML commands
T
F
Hadoop can process large quantities of any type of data, including video and Twitter feeds
T
F
The two key services of Hadoop are HDFS and in-memory computing.
T
F
A data warehouse may include information from legacy systems.
T
F
A data warehouse is typically comprised of several smaller data marts.
T
F
OLAP is a key tool of BI.
T
F
OLAP is used to find hidden patterns and relationships in large databases, and infer rules from these to determine future behavior.
T
F
In-memory computing relies on a computer's main memory for storing data.
T
F
Implementing a web interface for a database requires changes to the database itself.
T
F
Common Gateway Interface is a specification for processing data on a web server.
T
F
In linking databases to the web, the role of the application server is to host the DBMS.
T
F
Within a corporate information services department, the task of establishing the physical database and its logical relations are responsibilities of the ________ function.
data management
data administration
server administration
data modeling
database administration
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.
batch processing
data redundancy
data independence
online processing
data freedom
Detecting and correcting data in a database or file that are incorrect, incomplete, improperly formatted, or redundant is called:
data auditing.
defragmentation.
data scrubbing.
data optimization.
data repair.
A(n) ________ is a structured survey of the accuracy and level of completeness of the data in an information system
data quality audit
systems analysis
systems audit
data analysis
data overview
Common data quality problems include all of the following except:
missing codes.
Internet connectivity problems.
incorrect codes.
transposed numbers.
misspelled names.
A firm's information policy lays out who is responsible for updating and maintaining the information in a database system.
T
F
Redundant data often stems from the use of different codes to identify the same data in a firm's various information systems.
T
F
Data cleansing is the same process as data scrubbing.
T
F
An information policy specifies the procedures and rules for defining the structure and content of corporate databases.
T
F
Data administration is a special organizational function that manages the policies and procedures through which data can be managed as an organizational resource.
T
F
