CH13(answers) - Exam(CH 13 Name TRUE/FALSE Write'T if the...

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Exam (CH 13) Name___________________________________ TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) Conventional files can be designed and built quite rapidly (compared to a database), and the concerns for data availability and security are minimized by using them. 1) 2) The sharing of the data means that data need to be stored only once. 2) 3) Data have a better chance of being available in a conventional file system than in a database. 3) 4) Many users extract parts of the central database and download them onto personal computers. 4) 5) Within the realm of metadata, there are record definitions and data item definitions. 5) 6) Any object or event about which someone chooses to collect data is an attribute. 6) 7) An entity subtype is an entity that is used to represent a many - to - many relationship. 7) 8) An associative entity is used for repeating groups. 8) 9) Many data items can be packed into a field; the field can be read and converted to a number of data items. 9) 10) A primary key is one of the data items in a record that uniquely identifies a record. 10) 11) An object identifier is a unique key for each record in the database, not just in a table. 11) 12) Secondary keys can be used to select a group of records that belong to a set. 12) 13) Metadata describes the name given and the length assigned each record. 13) 14) Master files are large and contain all the information about an entity. 14) 15) Table files are used to update master files. 15) 16) Transaction files contain information necessary to produce reports but are not able to update master files.
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