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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 (A)
What does the symbol '+' represent in a UML class diagram?
What does the symbol '+' represent in a UML class diagram?
What best describes the purpose of an Activity diagram ?
What best describes the purpose of an Activity diagram ?
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?
What is not allowed in a Level One DFD regarding data flow ?
What is not allowed in a Level One DFD regarding data flow ?
UML system flows depicted with 'actor ' is named....
UML system flows depicted with 'actor ' is named....
What is the purpose of class Diagram ?
What is the purpose of class Diagram ?
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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