Exam 6: Data Modeling

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If the logical data model does not contain attributes that have repeating values it is in _____.

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B

On an ERD _________________:

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E

Entities are further designed with attributes.

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Metadata is data about data.

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ERD's and DFD's are two techniques for data modeling.

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Department stores have bridal registries.This registry keeps information about customers (the couple that is to be wed)prior to the wedding and keeps the data for a period of two years after the wedding (for returns or late purchasers),the products that the store carries,and the products that each couple has included in the registry.Couples typically register for a large number of products and many couples register for the same products.Draw an entity relationship diagram for Target's bridal registry:

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Anthony is working on the cardinality of doctors and patients in a large urban hospital.With the large number of doctors with varying specialties and patients that may have more than one aliment,he thinks the relationship might be noted as:

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An entity is the basic building block for a data model.

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Entity Relationship Diagrams show relationships between entities that are _____.

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Which is NOT true about using Visible Analyst Workbench?

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An entity relationship diagram (ERD):

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Relationships are associations between entities.

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Relationships are some type of information that is captured about entities.

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One of the most commonly used techniques for data modeling is ERD's.

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A logical data model that does not lead to repeating fields and that the data models leads to tables containing fields that are dependent on the whole identifier is in _____ normal form.

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CRUD stands for create,read,update and delete and can be used to verify DFDs and ERDs.

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Discuss what should be done to ensure that the entity relationship diagrams balance with the data flow diagrams.What is the consequence of failing to balance these models?

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An ERD is a picture which shows the information that is ________ by a business system?

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Modality refers to:

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CASE tools have 'data repositories'.

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