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Worksheets35. D1.2 Data Flow Diagrams
Total questions: 1
Worksheet time: 22mins
1-15.
Answer the questions below after watching the video
What is the primary purpose of a data flow diagram?
To document software code
To create a financial model
To manage team tasks
To illustrate the flow of data within a system
Which shape in a DFD represents a process or function?
Arrow
Rectangle
Oval
Rounded rectangle
In a DFD, what does an arrow signify?
Data storage
Data processing
Information flow direction
System boundary
What does a rectangle symbolize in a DFD?
Data flow
External entity
Process
Data storage
Which of the following is not a typical component of a data flow diagram?
Arrows
Decision nodes
External entities
Data stores
In a DFD, what does an oval typically represent?
A decision point
A data store
An external entity
A process
What action is taken if a credit check in a DFD fails?
Order is dispatched
Order is confirmed
Credit is increased
Order is rejected
What should be the focus when interpreting a complex DFD?
The color of symbols
The direction of arrows
The size of entities
The numbering of systems
What is the main focus when drawing a level zero DFD for an exam?
Simplifying the diagram
Detailing every process
Using all available symbols
Including external entities only
What type of diagram is used to simplify complex systems into top-level views?
Level zero DFD
UML diagram
Gantt chart
Blueprint
Which entity is not involved in the online shoe store DFD?
Credit card company
Warehouse
Supplier
Customer
What is the first step in constructing a level zero DFD?
Identifying processes
Drawing arrows
Identifying entities
Labeling data flows
Which entity is central in the online shoe store DFD?
Credit card company
Picca Lilly Shoes
Customer
Shipping service
In the driving school scenario, who receives the lesson booking details?
Instructor
Learner
School administrator
Database manager
In the driving school DFD, what is the main entity?
Learner
Instructor
Driving school
Vehicle
