SYSTEMS DEVELOPMENT ANALYSIS
APPLICATION DEVELOPMENT PROCESSES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Entities
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Data Flow
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Process
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Data Storage
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Detailed explanation-1: -Data Flow-Movement of data is shown by pointed arrows. Data movement is shown from the base of arrow as its source towards head of the arrow as destination.
Detailed explanation-2: -Data Flow – Movement of data between external entities, processes and data stores is represented with an arrow symbol, which indicates the direction of flow.
Detailed explanation-3: -A data flow diagram (DFD) maps out the flow of information for any process or system. It uses defined symbols like rectangles, circles and arrows, plus short text labels, to show data inputs, outputs, storage points and the routes between each destination.
Detailed explanation-4: -Physical DFD: Physical data flow diagram shows how the data flow is actually implemented in the system.
Detailed explanation-5: -Entities – Entities are source and destination of information data. Entities are represented by a rectangles with their respective names. Process – Activities and action taken on the data are represented by Circle or Round-edged rectangles.