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Which of the following is a type of attribute?


A) Single-valued attribute
B) Multi-valued attribute
C) Null-valued attribute
D) All of the above

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

Correct Answer

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What is a foreign key?


A) A field that uniquely identifies a given record in a table.
B) A primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables.
C) A table that uniquely identifies a given record in a field.
D) A foreign key of one table that appears as an entity in another table and acts to provide a logical relationship between the two records.

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

Correct Answer

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What exists to represent the relationship between two other entities?


A) One-to-one relationship
B) One-to-many relationship
C) Many-to-many relationship
D) Composite entity

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

Correct Answer

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D

What kind of attribute would be given for a person who does not have an email address?


A) Null-valued attribute
B) Multi-valued attribute
C) Single-valued attribute
D) Stored attribute

E) All of the above
F) A) and D)

Correct Answer

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What is a primary key?


A) A field that uniquely identifies a given record in a table.
B) A primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables.
C) A table that uniquely identifies a given record in a field.
D) A foreign key of one table that appears as an entity in another table and acts to provide a logical relationship between the two records.

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

Correct Answer

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What is a characteristic of a table?


A) Field
B) Table
C) Record
D) Key

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

Correct Answer

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A primary key is a field that uniquely identifies a given record in a table.

A) True
B) False

Correct Answer

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True

What is a collection of related data elements?


A) Field
B) Table
C) Record
D) Key

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

Correct Answer

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What expresses the specific number of instances in an entity?


A) Cardinality
B) Composite entity
C) Business rule
D) Null-valued attribute

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

Correct Answer

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What has only a single value of each attribute of an entity?


A) Single-valued attribute
B) Multi-valued attribute
C) Null-valued attribute
D) All of the above

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

Correct Answer

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A foreign key is a primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables.

A) True
B) False

Correct Answer

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What occurs between two entities in which an instance of one entity can be related to many instances of a related entity?


A) One-to-one relationship
B) One-to-many relationship
C) Many-to-many relationship
D) Composite entity

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

Correct Answer

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What is a technique for documenting the entities and relationships in a database environment?


A) Entity-relationship diagram
B) Data model
C) Database
D) Relational database model

E) C) and D)
F) All of the above

Correct Answer

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Which of the following statements is accurate?


A) A correct business rule for one organization may not be correct for another organization.
B) Each business rule will have entities and sometimes even attributes.
C) A typical business may have hundreds of business rules.
D) All of the above.

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

Correct Answer

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What kind of attribute would be date of birth?


A) Null-valued attribute
B) Multi-valued attribute
C) Derived attribute
D) Stored attribute

E) All of the above
F) C) and D)

Correct Answer

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Which of the following is a possible business rule?


A) A customer can purchase many DVDs
B) DVDs can be purchased by many customers
C) A DVD title can have many copies
D) All of the above

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

Correct Answer

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What kind of attribute would be age?


A) Null-valued attribute
B) Multi-valued attribute
C) Derived attribute
D) Stored attribute

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

Correct Answer

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What is a statement that defines an aspect of a business?


A) Attribute
B) Entity
C) Business relational diagram
D) Business rule

E) None of the above
F) All of the above

Correct Answer

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What kind of attribute can be calculated using the value of another attribute?


A) Single-valued attribute
B) Multi-valued attribute
C) Derived attribute
D) Stored attribute

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

Correct Answer

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What is composed of rows and columns that represent an entity?


A) Field
B) Table
C) Record
D) Key

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

Correct Answer

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B

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