Question

In a data flow diagram (DFD), what does the symbol of two parallel lines represent?

1) Data input symbol
2) Data output symbol
3) Data store symbol
4) Data flow symbol

Answer 1

In a Data Flow Diagram (DFD), the symbol of two parallel lines represents a Data Flow is 4) Data flow symbol

Step-by-step explanation:

This symbol is used to depict the movement of data from one process to another or from a process to a data store. The two parallel lines indicate the direction in which data is flowing in the system. It signifies the transfer of data from a source to a destination within the context of the diagram.

A Data Flow Diagram is a graphical representation of the flow of data within a system, and various symbols are employed to represent different elements. The symbol of two parallel lines specifically denotes the flow of data, making option 4, "Data flow symbol," the correct choice.