Exam 19: Database Design

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________ are attributes whose values are associated with one and only one entity instance.

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D

Normalized tables eliminate ________.

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B

The ________ notation signifies that an adviser can be related to many students and that a student can be related to many advisers.

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B

An identifier is an attribute whose value is associated with only one entity instance.

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Maximum cardinality in an E-R diagram refers to ________.

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Entities have ________ that describe the characteristics of the entities.

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In a data model,the entity names are always plural.

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The notation N:N is used to indicate a many-to-many relationship in E-R diagrams.

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________ is an example of an attribute in the E-R model.

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The general goal of normalization is to ________.

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Explain the database development process.

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The data model contains a description of the data.However,the model does not depict the relationships among the data.

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In a classroom,each student can have multiple advisers.In a data model,this can be best represented by which of the following notations?

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The UML model is the most popular tool for creating a data model.

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The maximum number of entities that can be involved in a relationship is known as maximum cardinality.

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In E-R diagrams,the attributes are represented with crow's feet.

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What are the different types of relationships represented in a data model?

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Entities have relationships to attributes,but not to each other.

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Tables that are not normalized are subject to data integrity problems.

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Once the users have validated and approved the data model,it is transformed into a ________.

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