FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -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-2: -A data flow diagram shows the way information flows through a process or system. It includes data inputs and outputs, data stores, and the various subprocesses the data moves through. DFDs are built using standardized symbols and notation to describe various entities and their relationships.

Detailed explanation-3: -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-4: -A data flow diagram (DFD) is used to graphically represent the flow of data in an information system. DFD describes the processes that are involved in a system to transfer data from the input to the file storage and report generation.

Detailed explanation-5: -Data flow diagrams are used in the functional description of systems and/or subsystems by showing how the input data of a processing component is transformed to the output data.