Session 11 Flashcards
1
Q
What does a double line on a data store or a source/sink represent?
A
The repetition of a data store or a source/sink to avoid data flow lines crossing
2
Q
What is a primitive DFD?
A
It’s the lowest level of decomposition for a DFD
3
Q
When should you stop decomposition?
A
When all processes have been reduced to a single decision
When all data stores represent data about a single entity
When any more detail is unwanted
When every data flow doesn’t have to be split further
When every business transaction is represented as a single data flow
