Chapter8_answers - Exam Name_ TRUE/FALSE. Write 'T' if the...

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Exam Name___________________________________ TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) The data dictionary is a reference work of data about data. 1) 2) Data about data is called metadata. 2) 3) The data dictionary can be used as a starting point for creating XML documents. 3) 4) The data dictionary can serve as a consistent standard for data. 4) 5) Automated data dictionaries are useful for only printing summary lists of data. 5) 6) A larger collection of project information is called a depository. 6) 7) A data dictionary contains information about a data flow diagram, but not entities or use cases. 7) 8) Data stores are usually the first component of a data dictionary to be defined. 8) 9) An internal data flow is one that connects two processes. 9) 10) Data structures are usually described using a binary notation. 10) 11) An alias for each element is another name for the data used by different users in different systems. 11) 12) Brackets [ ] represent repetitive elements. 12) 13) Parentheses represent an optional element in the data dictionary. 13) 14) Data structures are those data items within the system that are not meaningful if broken down further. 14) 15) A default value is one that never changes on a report. 15) 16) A discrete data element is one that has certain fixed values. 16) 17) When a V is used as a formatting character for an element, it indicates where the decimal point should occur, even though the actual decimal point in not included. 17) 18) All derived elements must be stored on a data store. 18) 19) Each level of a data flow diagram should use data appropriate for the level. 19) 20) It is important that data flow names on a child data flow diagram are contained within the parent process data flow. 20) 1
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21) A starting point for creating data dictionary entries is to identify and categorize system input and output data flow. 21) 22) The ideal data dictionary is automated, interactive, online, and evolutionary. 22) 23) To have maximum power, the data dictionary should be entirely independent from other programs. 23) 24) The data dictionary may be used to generate computer source code. 24) 25) The data dictionary is the one common source in the organization for answering questions and settling disputes about any aspect of data definition. 25) 26) One of the rules for analyzing a data dictionary is that elements present on a data flow coming or going to a data store must be contained within the data store. 26) 27) Extensible markup language (XML) is a language that can be used to exchange data between businesses. 27) 28) XML is used when other systems or external organizations use the same software. 28) 29) XML is a way to define, sort, filter and translate data into a universal data language. 29) 30) In XML, tags become the metadata. 30) 31) A document type definition is used to determine validity is the hardest part of creating an XML document because of its cryptic nature. 31)
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Chapter8_answers - Exam Name_ TRUE/FALSE. Write 'T' if the...

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