Dataflow Diagram (DFD) Flashcards
1
Q
Data Flow Diagram
A
Visual representation illustrates how data moves through a system or a process
Diagram designed using simple symbols such as rectangle, oval, or circle and arrows.
Aide in requirement analysis, process modelling, system design, and communication.
2
Q
Why DFDs not normally used in objects oriented system development ?
A
Due to process centric nature
struggle to represent objects, classes, inheritance, and polymorphism effectively
UML diagrams are better for OOSD.
3
Q
Elements of DFD
A
Processes
Data Flow
Data stores
External entities
Context diagram
Decomposition
4
Q
Properties in DFD
A
Hierarchy
Balancing
Consistency
Clarity
No control flow
Logical/ physical views
