Exam 9: Database Management Systems

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The data manipulation language

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C

What services are provided by a database management system?

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Database management systems typically provide the following services: a.program development which permits both programmers and end users to create applications to access the database; b.backup and recovery is built in therefore reducing likelihood of data loss; c.database usage reporting captures statistics on what data is being used,by whom,when; and especially d.database access is provided to authorized users.

Why are the hierarchical and network models called navigational databases?

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These are called navigational models because traversing or searching them requires following a predefined path which is established through explicit linkages between related records.

The deletion anomaly in unnormalized databases

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In the relational database model

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What is the relationship between a database table and a user view?

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Which term is not associated with the relational database model?

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What is a partial dependency?

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Data concurrency

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Describe a specific data element,entity,and record type in the expenditure cycle.

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The task of searching the database to locate a stored record for processing is called

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Which of the following is not a responsibility of the database management system?

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A description of the physical arrangement of records in the database is

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Give three examples that illustrate how cardinality reflects an organization's underlying business rules.

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What is a database lockout?

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Which of the following is not a problem usually associated with the flat-file approach to data management?

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Improperly normalized databases are associated with three types of anomalies: the update anomaly,the insertion anomaly,and the deletion anomaly.

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Which of the following is a relational algebra function?

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A replicated database is appropriate when

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In a hierarchical model

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