IT unit 2 5.2

what is a data flow diagram

• a diagram which shows the flow of water

• a visual representation of your mother

• a visual representation of how data is transformed

• a visual representation of how data is transferred

click on the process symbol below

click on the data store symbol below

what is a level zero data flow diagram

• the lowest level in the hit video game 'enter the gungeon'

• shows the transfer of data in the most complex manner possible

• my ping in Fortnite (real)

• shows data transfer in the most simple way possible

which of the following is a data flow diagram symbol (MCQ)

• external entity

• data antiflow

• data dump

• the cloud

Match the following for the rules for drawing a level 1 Data Flow Diagram (DFD)

• for each external entity

• data is connected

• flows in one direction

• data flow is labelled

• to at least 1 process

• data only

• with the data itself

• at least 1 input/output

impacts effecting the flow of information

• information characteristics

• human error

• comms breakdown

• hardware faliure

• all of the above