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Exam 2: Modeling Data in the Organization

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Question 21

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A value that indicates the date or time of a data value is called a(n) :

A) value stamp.
B) time stamp.
C) checkpoint.
D) check counter.

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

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Question 22

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A ________ specifies the number of instances of one entity that can be associated with each instance of another entity.

A) degree
B) cardinality constraint
C) counter constraint
D) limit

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

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Question 23

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An entity type whose existence depends on another entity type is called a ________ entity.

The number of entity types that participate in a relationship is called the ________ of the relationship.

An identifier should be chosen that has valid values and is not ________.

A good data definition will all of the characteristics of a data object EXCEPT:

What is the difference between an entity type and an entity instance?

Business rules are formulated from a collection of business ramblings.

A single occurrence of an entity is called an entity instance.

A simultaneous relationship among the instances of three entity types is called a ________ relationship.

A ________ is a statement that defines or constrains some aspect of the business.

A(n) ________ is the relationship between a weak entity type and its owner.

It is desirable that no two attributes across all entity types have the same name.

In the figure below,the name of the relationship follows the guidelines for naming a relationship.

In the following diagram,which answer is true?

What is an attribute on a relationship?

A simple attribute can be broken down into smaller pieces.

A business rule is a statement of how a policy is enforced or conducted.

A relationship name is a ________.

A(n)________ entity type exists independently of other entity types.