Exam 14: Database Design

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Master files or tables contain records that are relatively permanent. Thus, once a record has been added to a master file, it remains in the system indefinitely. The values of fields for the record will change over its lifetime, but the individual records are retained indefinitely.

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Appropriate controls must be designed to ensure that no field takes on a value that is outside of the range of legal values. This refers to:

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A collection of similar records is known as:

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The primary key for a record can have a NULL value. This defines a template record.

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______________________________________ files contain relatively static data that can be shared by applications to maintain consistency and improve performance.

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Database design should proceed only if the underlying logical data model is in at least _____________________ normal form.

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When entire tables are duplicated and stored in multiple locations or file servers, it is known as:

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The physical, relational database implementation of the data model is known as the scenario.

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Most organizations build several databases leading to significant and uncontrolled redundancy between databases.

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A primary key is a field whose values identify one and only one record in a file.

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A role name is an alternate name for a foreign key that clearly distinguishes the purpose that the foreign key serves in the table.

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Files that are special records of updates to other files, especially master and transaction files, are known as:

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Database technology is ______________________ (simpler or more complex) than file technology.

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A database management system (DBMS) is specialized computer software available from computer vendors that is used to create, access, control, and manage the database.

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Some database systems can compress unused fields and values to conserve disk storage space.

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Which of the following are not criteria for producing a quality data model?

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Foreign keys are pointers to the records of a different file in a database.

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A(n) _____________________________ is a collection of similar records.

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A single file in a database may only have one _______________________ key, but it may have several ____________________________keys.

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_________________________________ record structures allow different records in the same file to have different lengths.

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