DBC – Flashcard

DBC – Flashcard

Data and information are essentially the same thing
FALSE
Data processing can be as simple as organizing data to reveal patters
TRUE
Data is the result of processing raw facts to reveal its meaning
FALSE
When data are entered into a form and saved, they are placed in the underlying database as knowledge
FALSE
Data constitute the building blocks of information
TRUE
Metadata describe the data characteristics and the set of relationships that links the data found within the databse
TRUE
The only way to access the data in a database is through the DBMS
TRUE
Database programming languages receive all application requests and translate them into the complex operations required to fulfill those requests
FALSE
The DBMS reveals as much of the database’s internal complexity to the application programs and users
FALSE
One disadvantage of the DBMS is that it increases the risk of data security breaches
FALSE
An operation database is sometimes referred to as an enterprise database
FALSE
A data warehouse can store data derived from many sources
TRUE
The same data might be simultaneously structured and unstructured depending on the intended processing
TRUE
Corporations use only structured data
FALSE
Field refers to a collection of related records
FALSE
Data anomaly is defined as the condition in which all of the data in the database are consistent with the real world events and conditions
FALSE
Structural dependence exists when it is possible to make changes in the file structure without affecting the application program’s ability to access the data
FALSE
An advantage of database systems is that you needn’t perform frequent updates and apply latest patches
FALSE
One disadvantage of a database system over previous data management approaches is increased costs
TRUE
One advantage of a database system over previous data management approaches is that the database system is considerably less complex
FALSE
____ is the result of revealing the meaning of raw facts
End-user data
____ is the body of information and facts about a specific subject
Knowledge
Accurate, relevant, and timely information is the key to _____
good decision making
End-user data is ____
raw facts of interest to the end user
____ provide a description of the data characteristics and the set of relationships that link the data found within the database
metadata
____ serve as the intermediary between the user and the database
DBMS
The database structure in a DBMS is stored as a
collection of files
An _____ might be written by a programmer or it might be created through a DBMS utility program
application
_____ exists when different versions of the same data appear in different places
data inconsistency
_____ refer to a type of database that stores most of its data in RAM rather than in hard disks
in-memory databases
The response of the DBMS to a query is the ____
query result set
An ____ database is used by an organization and supports many users across many departments
enterprise
A _____ database supports a relatively small number of users (usually fewer than 50) or a specific department within an organization
workgroup
A workgroup database is a ____ database
multiuser
____ is defined as the condition in which all of the data in the database are consistent with the real-world events and conditions
data integrity
A desktop database is a ____ database
single user
Data warehouse contains historical data obtained from the _____
operational databases
Data is said to be verifiable if
the data always yields consistent results
____ data exist in the format in which they were collected
Unstructured
____ data exists in a format that does not lend itself to processing that yields information
unstructured
_____ are the result of formatting disorganized data in order to facilitate storage, use and generation of information
structured data
Most data that can be encountered are best classified as ____
semistructured
Which of the following is true of spreadsheet applications?
They enhance the user’s ability to understand the data
An XML database supports the storage and management of ____ XML data
semistructured
The organization of data within folders in a manual file system is determined by ____
its expected use
A ____ is a logically connected set of one or more fields that describes a person, place, or thing
record
A ____ is a collection of related records
file
A ____ is a character or group of characters that has a specific meaning
field
Which of the following refers to the situation where different versions of the same data are stored at different places because they weren’t updated consistently?
data redundancy
The term ____ refers to an organization of components that define and regulate the collection, storage, management and use of data within a database environment
database system
____ relates to the activities that make the database execute transactions more efficiently in terms of storage and access speed.
performance tuning
____ is the result of processing raw data to reveal its meaning
information
To reveal meaning, information requires ____
context
Raw data must be properly ____ for storage, processing, and presentation
formatted
Information is produced by processing ____
data
____ is data about data through which the end-user data are integrated and managed
metadata
A ____ database is a collection of programs that manages the database structure and controls access to the data stored in the database
DBMS
A ___ is a specific request issued to the DBMS for data manipulation
query
____ databases focus primarily on storing data used to generate information required to make tactical or strategic decisions
analytical
___ is a special language used to represent and manipulate data elements in a textual format
XML (extensible markup language)
An ____ is a spur-of-the-moment question
ad hoc query
____ exists when it is possible to make changes in the data storage characteristics without affecting an application program’s ability to access data
data independence
The term ____ refers to scattered locations storing the same basic data
islands of information
____ exists when different and conflicting versions of the same data appear in different places
data inconsistency
___ exists when the same data are stored unnecessarily at different places
data redundancy
A(n) ___ develops when all required changes in the redundant data are not made successfully
data anomaly
The DBMS uses the _____ to look up the required data component structures and relationship,s thus relieving programmers form having to code such complex relationships in each program
data dictionary
___ relates to activities that make a database operate mroe efficiently in terms of storage and access space
performance turning