Deck 1: Introduction to Database Management

Question 1

A database will not only hold information about multiple types of entities,but also information about the relationships among these multiple entities.

Answer 1

True

Question 2

​Software packages,called database management systems,can do the job of manipulating databases for you.

Answer 2

True

Question 3

An attribute is known as a row in most databases.

Answer 3

False

Question 4

​Storing the same data in more than one place is called ____.

A) ​data independence
B) ​redundancy
C) ​data integrity
D) ​security

Question 5

A DBA can assign passwords to prevent unauthorized users from accessing the data.​

Question 6

There is a greater impact of failure in a nondatabase,file-oriented system.​

Question 7

An advantage of using the database approach to processing is that it facilitates consistency.​

Question 8

A(n)____ is a person,place,object,event,or idea for which you want to store and process data.​

A) ​attribute
B) ​DBMS
C) ​entity
D) ​DBA

Question 9

The ____ of an entity become the columns in the database table.​

A) ​attributes
B) ​tuples
C) ​data files
D) ​E-R diagrams

Question 10

Programs created with Visual Basic,Java,Perl,PHP,or C++ can access the database directly,rather than having to access it through the DBMS.​

Question 11

Sharing data is one advantage of database processing.​

Question 12

A(n)____ is the computer counterpart to an ordinary paper file you might keep in a file cabinet or an accounting ledger.​

A) ​database
B) ​spreadsheet
C) ​data file
D) ​attribute

Question 13

Redundancy wastes space because you are storing different types of data in the same place.​

Question 14

​A(n)____ is also called a field or column in many database systems.

A) ​attribute
B) ​entity
C) ​data file
D) ​relationship

Question 15

​Each table in a database represents two or more entities.

Question 16

​The relationship between different entities (in different tables)is handled by their common columns.

Question 17

An attribute is a characteristic or property of an entity.

Question 18

To create forms to use with a database you must write a program.​

Question 19

When you need to change data,redundancy makes your changes more cumbersome and time-consuming.

Question 20

An entity is also defined as an attribute.

Question 21

​____ are screen objects used to maintain,view,and print data from a database.

A) ​Fields
B) ​Forms
C) ​Data files
D) ​Entities

Question 22

In an E-R diagram,____________________ represent entities.​

Question 23

During the ____ process,a database expert determines the structure of the required database.​

A) data security​
B) ​database integrity
C) ​database design
D) ​database selection

Question 24

​Unlike a typical data file,a database can store information about multiple ____.

A) ​attributes
B) ​bytes
C) ​entities
D) ​characters

Question 25

​A(n)____ frees programmers who write database access programs from having to engage in mundane data manipulation activities,such as adding new data and deleting existing data.

A) ​E-R diagram
B) ​DBA
C) ​entity
D) ​DBMS

Question 26

In an E-R diagram,the ____________________ at the end of a line indicates the "many" part of the one-to-many relationship between two entities.

Question 27

A good ____ should provide an opportunity for users to incorporate integrity constraints when they design the database.​

A) ​database administrator
B) ​DBA
C) ​E-R diagram
D) ​DBMS

Question 28

In a(n)____________________ relationship between two entities,each occurrence of the first entity is related to many occurrences of the second entity and each occurrence of the second entity is related to only one occurrence of the first entity.​

Question 29

____ is the prevention of unauthorized access to the database.​

A) ​Data independence
B) ​Integrity constraint
C) ​Redundancy
D) ​Security

Question 30

In an E-R diagram,____________________ represent relationships between connected entities.​

Question 31

One disadvantage of a database system is ____.​

A) ​a larger file size
B) ​data dependence
C) ​reduced integrity
D) ​reduced productivity

Question 32

A person who is in charge of a database within an organization is often called the database ____.​

A) writer​
B) ​designer
C) ​administrator
D) ​controller

Question 33

A database has ____ if the data in it satisfies all established integrity constraints.​

A) ​redundancy
B) ​integrity
C) ​data independence
D) ​database design

Question 34

​A visual way to represent a database is with a(n)____.

A) ​spreadsheet
B) ​DBMS
C) ​entity-relationship diagram
D) ​DBA

Question 35

Popular ____ include Access,Oracle,DB2,MySQL,and SQL Server.​

A) ​E-R diagrams
B) ​DBAs
C) ​data files
D) ​DBMSs

Question 36

​Which of the following statements is correct?​

A) ​In a nondatabase, file-oriented environment, data is often partitioned into several disjointed systems with each system having its own collection of files.
B) ​User data cannot be combined and shared among authorized users.
C) Database users should not have access to the same information.​
D) The elimination of redundancy is always possible.​

Question 37

​____ is a property that lets you change the structure of the database without requiring you to change the programs that access the database.

A) ​Database design
B) ​Data independence
C) ​Integrity constraint
D) ​Data dependence

Question 38

A DBMS lets you assign users to ____.​

A) ​groups
B) ​classes
C) ​attributes
D) ​clusters

Question 39

​An integrity constraint is a rule that ____.

A) ​is kept in an external file
B) ​data must follow in the database
C) ​can be accessed only by authorized users
D) ​can unintentionally be accessed by unauthorized users

Question 40

A program,or collection of programs,through which users interact with a database is known as a(n)_________________________.​

Question 41

A database file requires a large amount of disk space and internal ____________________.​

Question 42

The problem of inconsistency in data is a direct result of ____________________.​

Question 43

Explain why it is better to try to control redundancy rather than eliminate it.​

Question 44

Discuss how the database approach and the nondatabase approach differ in terms of ensuring the security of the database.​

Question 45

Eliminating ____________________ not only saves space but also makes the process of updating data much simpler.​

Question 46

Explain why the impact of failure is greater in database processing,compared with the nondatabase approach.​

Question 47

List the disadvantages of database processing.

Question 48

​A group of people in charge of a database within an organization is often called the ____________________.

Question 49

A good _________________________ has many features that allow users to gain access to data in a database without having to do any programming.​

Question 50

List the advantages of database processing.​