Concepts that show important features in object-oriented systems are object identifiers, classes, inheritance, abstraction, and polymorphism. Provide explanations and examples/illustrations for these four features.

Computer Networking: A Top-Down Approach (7th Edition)
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1. Concepts that show important features in object-oriented systems are object identifiers, classes, inheritance, abstraction, and polymorphism. Provide explanations and examples/illustrations for these four features.


2. In the UML Use Case diagram, what is known as a stereo type: extension (<<extend>>) and inclusion (<<include>>). What do they mean, and give examples of their use.


3. Explain and give an example of a class representation template in object-oriented structural modeling. Compare the difference with drawing object diagrams.


4. Although using almost the same notation and symbol diagrams, explain the basic differences between Activity Diagrams and State Machine Diagrams.

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