Question

draw the DFDs upto 3rd level for online course management system of a university

Answer 1

Context diagram: An overview of an organizational system that shows the system boundaries, external entities that interact with the system and the major information flows between the entities and the system. In this diagram, a single process represents the whole system.

First level DFD: A data flow diagram that represents a system’s major processes, data flows, and data stores at a high level of detail.

Draw the DFDs upto 2nd level for Online Examination System.