MIS-Chapter 6

What is the first step you should take in managing data for a firm?

Identify the data needed to run the business.

Which of the following best illustrates the relationship between entities and attributes?

The entity CUSTOMER with the attribute ADDRESS

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

A characteristic or quality describing an entity is called a(n):

Attribute

The most basic business database is comprised of:

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

In a relational database, a record is also called a(n):

Tuple

A field identified in a table as holding the unique identifier of the table’s records is called the:

Primary key

A field identified in a record as holding the unique identifier for that record is called the:

Key field

A schematic of the entire database that describes the relationships in a database is called a(n):

Entity-relationship diagram.

A one-to-one relationship between two entities is symbolized in a diagram by a line that ends

In two short marks

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.

A table that links two tables that have a many-to-many relationship is often called a(n):

Intersection relation

The process of streamlining data to minimize redundancy and awkward many-to-many relationships is called:

Normalization

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.

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

Relational database systems use ________ to ensure that relationships between coupled tables remain consistent.

Referential integrity rules

The smallest unit of data a computer can handle is called a:

Bit

A grouping of characters into a word, a group of words, or a complete number is called a record.

False

Every record in a file should contain at least one key field.

True

A foreign key is a field that links to a separate table.

True

A DBMS makes the:

physical database available for different logical views.

The logical view of a database:

presents data as they would be perceived by end users.

Which of the following allows users to add, change, delete, or retrieve data in a database?

Data manipulation language

In a relational database, the three basic operations used to develop useful sets of data are:

select, project, and join.

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.

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 is the most prominent data manipulation language today?

SQL

What is the purpose of a DBMS’s data definition function?

Structuring the database

Both Oracle and Microsoft Access use SQL to retrieve information from a database.

True

DBMS simplify how end users work with databases by separating the logical and physical views of the data.

True

A DBMS is special software for creating, storing, organizing, and accessing data from a database.

False

A physical view shows data as it is organized on the storage media.

True

End users use a data manipulation language to manipulate data in the database.

True

MongoDB and SimpleDB are both examples of:

NoSQL databases.

Access is a:

DBMS for desktop PC systems.

In clustering, a data mining tool will find:

new groupings within data.

MySQL is a:

popular open-source DBMS.

Data mining is more ________ than OLAP.

discovery driven

All of the following are tools or technologies for extracting information from unstructured data sets except:

SQL queries.

DBMS typically include report-generating tools in order to:

display data in an easier-to-read-format.

Which of the following database types would be best suited for storing multimedia?

Non-relational DBMS

Pre-configured hardware-software systems that use both relational and non-relational technology optimized for analyzing large datasets are referred to as:

Analytic platforms.

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.

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.

Tools for consolidating, analyzing, and providing access to vast amounts of data to help users make better business decisions are known as:

Business intelligence

Which of the following enables users to view the same data in different ways using multiple dimensions?

OLAP

OLAP is a tool that enables users to:

obtain online answers to ad hoc questions in a rapid amount of time.

Data mining is a tool for allowing users to:

find hidden relationships in data.

In terms of the data relationships found by data mining, associations refers to:

occurrences linked to a single event.

In terms of the data relationships found by data mining, sequences refers to:

events linked over time.

Which of the following would you use to find patterns in user interaction data recorded by web servers?

Web usage 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 structure mining

Businesses use ________ tools to search and analyze unstructured data sets, such as emails and memos.

text mining

Hadoop is a(n):

open-source software framework designed for distributing data-processing over inexpensive computers.

A data ________ stores current and historical data of potential interest to decision makers throughout the company.

Warehouse

A(n) ________ is a dedicated computer in a client/server environment that hosts a DBMS.

Database server

Which of the following is an example of a company whose business model is based on access to large databases through the web?

Facebook

Links pointing to an online document are a sign of:

Popularity

Links coming out of an online document are a sign of:

richness or variety of topics covered.

Within a corporate information services department, the task of establishing the physical database and its logical relations are responsibilities of the ________ function.

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.

data redundancy

Detecting and correcting data in a database or file that are incorrect, incomplete, improperly formatted, or redundant is called:

data scrubbing.

A(n) ________ is a structured survey of the accuracy and level of completeness of the data in an information system.

data quality audit

Common data quality problems include all of the following except:

Internet connectivity problems.