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Questions and Answers
In level 1 DFD, how should data flow be represented?
In level 1 DFD, how should data flow be represented?
What is an association?
What is an association?
A use case specification has one or more flow of events or pathways associated with it.
A use case specification has one or more flow of events or pathways associated with it.
True
What does the symbol '+' represent in a UML class diagram?
What does the symbol '+' represent in a UML class diagram?
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What best describes the purpose of an Activity diagram ?
What best describes the purpose of an Activity diagram ?
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What diagram shows the order in which the action takes place and identify the outcomes?
What diagram shows the order in which the action takes place and identify the outcomes?
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What is not allowed in a Level One DFD regarding data flow ?
What is not allowed in a Level One DFD regarding data flow ?
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UML system flows depicted with 'actor ' is named....
UML system flows depicted with 'actor ' is named....
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What is the purpose of class Diagram ?
What is the purpose of class Diagram ?
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What is the main difference between aggregation and composition in class diagrams?
What is the main difference between aggregation and composition in class diagrams?
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Study Notes
Data Flow Diagram (DFD)
- In a Level 1 DFD, data flow is represented by an arrow connecting the external entity, process, and data store.
Association
- An association is a connection between two or more classes in a UML class diagram.
Use Case Specification
- A use case specification has one or more flow of events or pathways associated with it.
UML Class Diagram
- The symbol '+' in a UML class diagram represents public visibility.
Activity Diagram
- The purpose of an Activity diagram is to describe the flow of activities and actions.
Data Flow Diagram (DFD)
- In a Level One DFD, data flow is not allowed to flow from a data store to another data store.
UML System
- UML system flows depicted with an 'actor' are named Use Cases.
Class Diagram
- The purpose of a Class Diagram is to show the structure and relationships of classes.
Aggregation and Composition
- The main difference between aggregation and composition in class diagrams is that aggregation represents a "part-of" relationship, whereas composition represents a "part-of" and "owned-by" relationship.
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Description
Test your understanding of Data Flow Diagrams (DFDs) at Level 1. Learn how to represent data flow correctly and master the fundamentals of DFDs.
