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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 these choices

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

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

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 C)

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 kind of attribute is date of birth?


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

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

Correct Answer

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What kind of attribute is assigned to an attribute when no other value applies or when a value is unknown?


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

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

Correct Answer

verifed

verified

A one-to-many relationship occurs between two entities in which an instance of one entity can be related to only one instance of a related entity.

A) True
B) False

Correct Answer

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