VISUAL BASIC

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 diagrams use arrows to show the direction of the flow of data. Whether you use Gane & Sarson or Yourdon & DeMarco), a unidirectional arrow means an unidirectional flow: Your first diagram means that the data flows from the back-end to the front-end and only in that direction.

Detailed explanation-3: -Data in motion, also referred to as data in transit or data in flight, is a process in which digital information is transported between locations either within or between computer systems. The term can also be used to describe data within a computer’s RAM that is ready to be read, accessed, updated or processed.

Detailed explanation-4: –Data Destinations are also referred to as data sinks. The flow of the data into or out of a process is represented by curved or straight lines with arrows. The processes that transform data from inputs to outputs are represented by circles.

Detailed explanation-5: -Data Flow Diagram symbols are standardized notations, like rectangles, circles, arrows, and short-text labels, that describe a system or process’ data flow direction, data inputs, data outputs, data storage points, and its various sub-processes.

Detailed explanation-6: -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.