Practic Mode : Paper-II & III On Topic : System Software and Compilers

Que : 1 . Which possibility among the following is invalid in case of a Data Flow Diagram? (D-2006)

1. A process having in-bound data flows more than out-bound data flows
2. A data flow between two processes
3. A data flow between two data stores
4. A data store having more than one in-bound data flows
Please Select Ans Options .

Option 3 is Correct Answer.
DFD is a graphical representation of the "flow" of data through an information system, modelling its process aspects. A DFD is often used as a preliminary step to create an overview of the system, which can later be elaborated. DFDs can also be used for the visualization of data processing (structured design). A DFD shows what kind of information will be input to and output from the system, where the data will come from and go to, and where the data will be stored. It does not show information about the timing of process or information about whether processes will operate in sequence or in parallel (which is shown on a flowchart)