Subject: Object Oriented Modeling and Design

Difficulty: Medium

Marks: 4 Marks

Behavioral modeling: - It indicates how software will respond to external events or stimuli. In behavioral model, the behavior of the system is represented as a function of specific events and time.

To create behavioral model following things can be considered:

• Evaluation of all use-cases to fully understand the sequence of interaction within the system.
• Identification of events that drive the interaction sequence and understand how these events relate to specific classes.
• Creating sequence for each use case.
• Building state diagram for the system.
• Reviewing the behavioral model to verify accuracy and consistency.

It describes interactions between objects. It shows how individual objects collaborate to achieve the behavior of the system as a whole.InUML behavior of a system is shown with the help of usecase diagram, sequence diagram and activity diagram

• A use case focuses on the functionality of a system i.e. what a system does for users. It shows interaction between the system and outside actors.Ex: Student, librarians are actors, issue book use case.

• A sequence diagram shows the objects that interact and the time sequence of their interactions.Ex: Student, librarians are objects. Time sequence enquires for book check availability –with respect time.

• An activity diagram specifies important processing steps. It shows operations required for processing steps. It shows operations required for processing.Ex issue book, check availability does not show objects