Practical 18 : Prepare a use case diagram and sequence diagram for a computer email system

Solution:

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Practical 16 : Categorize the following relationships into generalization, aggregation or association.

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[A] A country has a capital city Solution: [B] A dining philosopher uses a fork Solution: [C] A file is an ordinary file or a directory file Solution:                                                      [D] Files contains records Solution: [E] A polygon is composed of an ordered set of points Solution: [F] A drawing object is text, a geometrical object, or a group Solution: [G] A person uses a computer language on a object Solution: [H] Modems and keyboards are input/output devices Solution: [I] Classes may have several attributes Solution: [J] A person plays for a team in a certain year Solution: [K] A route connects two cities Solution: [L] A student takes a course from a professor Solution:
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