What is DFD?

DFD stands for a data flow diagram that represents the information in a system. It tells about the system requirement. DFD can be automated, manual, or both.

DFD also tells about the flow of data, the cause of the change of information, and the location of the data where it is stored. DFD is referred to as a data flow graph and bubble chart and it shows the boundaries and scope of the system.

There are 3 levels of a Data flow diagram which are given below: -

0 – level DFD

1 – level DFD

2 – level DFD