Exam 5: Data and Process Modeling

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Many analysts follow _____, which means that they develop a physical model of the current system, a logical model of the current system, a logical model of the new system, and a physical model of the new system.

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The analysts at Techno InfoSystems are considering the four-model approach to system development for a new client. -Which of the following is a benefit if they use the four-model approach?

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In a data flow diagram (DFD), processes contain the business logic, also called business rules, which transform the data and produce the required results.​

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The analysts at Techno InfoSystems are considering the four-model approach to system development for a new client. -If they make use of the four-model approach, which of the following is a likely outcome?

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In a data flow diagram (DFD), a process symbol can have only one outgoing data flow.​

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A _____ shows how data acts through an information system but does not show program logic or processing steps.

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What are the guidelines to be followed when you draw a context diagram and other data flow diagrams (DFDs)?

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In modular design, _____ also is called looping.

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In a data dictionary, _____ is the maximum number of characters for an alphabetic or character data element or the maximum number of digits and number of decimal positions for a numeric data element.

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Matching ​Identify the letter of the choice that best matches the phrase or definition. -​Documentation of all data flows along with documenting each data element

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  -In a data flow diagram (DFD), a spontaneous generation process is a process that has _____. -In a data flow diagram (DFD), a spontaneous generation process is a process that has _____.

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In data and process modeling, a(n) _____ shows what the system must do, regardless of how it will be implemented physically.

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Matching ​Identify the letter of the choice that best matches the phrase or definition. -Describes how a system will be constructed

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The iteration structure is the completion of _____.

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The disadvantage of the four-model approach is that ____.

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  -In a data flow diagram (DFD), a gray hole is a process that has _____. -In a data flow diagram (DFD), a gray hole is a process that has _____.

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  -Among the symbols in the accompanying figure, a _____ is used to represent data that a system stores because one or more processes need to use the data at a later time. -Among the symbols in the accompanying figure, a _____ is used to represent data that a system stores because one or more processes need to use the data at a later time.

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In a data flow diagram (DFD), systems analysts call an entity that receives data from the system a source.

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What makes one system more complex than another is the number of components, the number of levels, and the degree of interaction among its processes, entities, data stores, and data flows.

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Since diagram 0 is a(n) _____ version of process 0, it shows considerably more detail than a context diagram.

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