Exam 9: Data Design

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A repeating group is a set of one or more fields that can occur only once in a single record, with each occurrence having the same value.

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Computers represent data as ____________________ that have only two possible values: zero (0) or one (1).

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  -In the table or file shown in the accompanying figure, a(n) ____________________ is a set of related fields that describes one instance, or occurrence of an entity. -In the table or file shown in the accompanying figure, a(n) ____________________ is a set of related fields that describes one instance, or occurrence of an entity.

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A table design is in third normal form (3NF) if it is in 2NF and if all nonkey fields are dependent on other nonkey fields.

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____ means that a system can be expanded, modified, or downsized easily to meet the rapidly changing needs of a business enterprise.

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A(n) ____________________ date is the total number of days from some specific base date.

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MATCHING Identify the letter of the choice that best matches the phrase or definition. -A foreign key value that does not match an existing key in another table.

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Because it supports virtually all languages, ____________________ has become a global standard.

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One problem in a typical file-processing environment is the rigid data structure. _________________________

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A(n) ____ is a set of letters or numbers that represents a data item.

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Which of the following is the advantage of a DBMS (database management system)?

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List at least 6 guidelines for developing a code.

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  -In the accompanying figure, any field that could serve as a primary key is called a ____. -In the accompanying figure, any field that could serve as a primary key is called a ____.

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In a file-oriented information system, a history file contains reference data used by the information system.

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In a file-oriented information system, a master file ____.

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____ is the process of converting readable data into unreadable characters to prevent unauthorized access to the data.

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In a file-oriented information system, a table file is a file created for historical or archiving purposes.

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To protect stored data, users can be asked to furnish a proper user ID and password to access a file or database.

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  -A(n) ____________________, such as that shown in the accompanying figure, contains a set of related records that store data about a specific entity. -A(n) ____________________, such as that shown in the accompanying figure, contains a set of related records that store data about a specific entity.

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The inherent efficiency of high-volume processing on larger computers is called ____________________.

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