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A(n) ________ is a request for data from a database.


A) form
B) report
C) query
D) application

E) A) and B)
F) A) and C)

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In an entity-relationship (E-R) diagram, an entity is represented by a triangle, and the relationships between entities are represented by dotted lines.

A) True
B) False

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Most organizations develop their own DBMS software in order to obtain control over data.

A) True
B) False

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In an E-R diagram, a line between two entities represents a(n) ________.


A) attribute
B) identifier
C) cardinality
D) relationship

E) B) and C)
F) None of the above

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A key is a column or group of columns that identifies a unique row in a table.

A) True
B) False

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Database applications must present data to the users in the same format as the database table.

A) True
B) False

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Describe entities in the context of data models.

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An entity is something that the users wa...

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An identifier is an attribute or a group of attributes whose value is associated with one, and only one, entity instance.

A) True
B) False

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The columns in a database are called ________.


A) records
B) tables
C) files
D) fields

E) A) and C)
F) None of the above

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What is a database application?

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A database application is a collection o...

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Brenda, the sales manager of a firm, wants to generate a particular report containing sales analyses of the second and third quarter of the year. She should use a ________ to obtain the information that she wants from the database.


A) report
B) data model
C) database administrative function
D) query

E) A) and B)
F) B) and C)

Correct Answer

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The forked lines on the right side of a line on an E-R diagram that indicate a 1:N relationship between two entities are referred to as ________.


A) identifiers
B) foreign keys
C) crow's feet
D) entities

E) A) and D)
F) None of the above

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Every table in a normalized database has a ________.


A) one-to-one relationship between entities
B) single theme
C) foreign key
D) specialized query format

E) None of the above
F) C) and D)

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Which of the following is a nonrelational data store developed by Google?


A) Cassandra
B) Dynamo
C) SharePoint
D) Bigtable

E) None of the above
F) A) and D)

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Developers generally construct a logical representation of database data, called a data model, after building a database.

A) True
B) False

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When you modify or delete data present in a database, you are ________.


A) creating a new database
B) forming a data model
C) simplifying the data structure
D) processing the database

E) None of the above
F) B) and D)

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To modify an existing table, a developer can open the metadata form for that table and add a new row of metadata.

A) True
B) False

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A primary key used in a database is a ________.


A) group of rows that are formed to identify a unique table or file
B) column or group of columns that identifies a unique row in a table
C) character or byte that represents fields or columns
D) group of tables or files formed to identify a unique field or row

E) B) and C)
F) A) and D)

Correct Answer

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Most traditional databases use the Internet to transmit traffic back and forth between the users' computers and the DBMS server.

A) True
B) False

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The format of metadata depends on the software product that is processing the database.

A) True
B) False

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