describe about use case and external case in dfd, Database Management System

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describe about use case and external case in dfd

Describe about Use Case and external case in DFD

The processes are transformed those into the Use Case and external case in DFD has same characteristics which of an actor in OOAD.

The data store is transformed into class and part of data store to attributes of class.

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Database Management System: describe about use case and external case in dfd

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