Question

How are data sources and destinations represented in a data flow diagram? 1) As a square 2) As a curved arrow 3) As a circle 4) As two parallel lines 5) None of the above

Answer 1

In a Data Flow Diagram (DFD), data sources and destinations are typically represented as squares.

How data sources are represented

A data flow diagram (DFD) illustrates the flow of data within a system, showing how information moves between processes, data stores, and external entities.

Squares in a DFD represent external entities such as data sources (where data originates) or data destinations (where data is sent or consumed).

These entities interact with the system being analyzed, either providing input data (sources) or receiving output data (destinations).

Therefore, the correct representation for data sources and destinations in a DFD is: 1) As a square