Exam 4: Data Modeling and the Entity Relationship Model

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Unified Modeling Language (UML)has quickly replaced the E-R Model as the most popular technique for creating data models.

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Describe the use of Microsoft Access as a prototyping tool.

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Prototyping a database allows users to validate the data model by demonstrating the consequences of data modeling decisions.Microsoft Access is a good tool to build prototype databases because of its ease of use.Microsoft Access database files can be easily copied to create multiple copies of a database,which allows a variety of data models to be created.Further,Microsoft Access wizards allow easy mock-ups of forms and reports for prototyping.Therefore,Microsoft Access is often used to build prototype databases regardless of whether or not Access itself will be the final DBMS.

Whether or not an instance of one entity class must participate in a relationship with another entity class is indicated by the:

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In crow's foot style E-R diagrams,an entity class is represented by a(n)________.

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Subtype entities may be either exclusive or inclusive.

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Which of the following activities is not performed during the implementation phase of developing a database system?

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The E-R Model assumes that all instances of a given entity class have the same attributes.

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How is maximum cardinality expressed in crow's foot E-R diagrams?

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In crow's foot style E-R diagrams,a circle across the relationship line near an entity indicates:

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The Microsoft Access 2013 form editor is a(n):

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Microsoft Access is a good tool for creating mock-ups of forms and reports because:

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The number of entity classes involved in a relationship is the cardinality of the relationship.

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In crow's foot E-R notation,a circle indicates a minimum cardinality of zero.

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A(n)________ is a working demonstration of selected portions of the future system.

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Microsoft Access 2013 uses banded form and report editors.

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Which of the following would not be contained in a use case?

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System requirements as documented by use cases,business rules,forms,reports,and queries are sufficient to design the database without using a formal data model.

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Microsoft Access 2013 can be used to build a prototype database,which allows users to validate the data model by demonstrating the consequences of data modeling decisions.

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Microsoft Access 2013 is only used to prototype databases where Microsoft Access itself will be the final DBMS.

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When developing a database system,the database is constructed during the implementation phase.

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