VISUAL BASIC

Detailed explanation-1: -A Data Flow Diagram (DFD) is a graphical representation of the “flow” of data through an information system (as shown on the DFD flow chart Figure 5), modeling its process aspects. Often it is a preliminary step used to create an overview of the system that can later be elaborated.

Detailed explanation-2: -Also known as DFD, Data flow diagrams are used to graphically represent the flow of data in a business information system. DFD describes the processes that are involved in a system to transfer data from the input to the file storage and reports generation. Data flow diagrams can be divided into logical and physical.

Detailed explanation-3: -Data flow diagram (DFD)-In software engineering, it is a way of representing the flow of data of a process or a system.

Detailed explanation-4: -A data flow diagram (or DPD for short) shows how processes flow through a system. It also gives you information about the inputs and outputs (where things come from, which route they go through, and where they end up) and the process itself. This includes data stores and the various subprocesses the data moves through.

Detailed explanation-5: -A rectangle is the most commonly used symbol to depict a process in a context-level Data Flow Diagram (DFD).