Question

Categorize the following relationships into generalization, aggregation, or association. Beware, there may be n-ary associations in the list, so do not assume every relationship involving three or more classes is a generalization.
A. A country has a capital city.B. A dining philosopher uses a fork.C. A file is an ordinary file or a directory file.D. Files contain records.E. A polygon is composed of an ordered set of points.F. A drawing object is text, a geometrical object, or a group.
G. A person uses a computer language on a project.H. Modems and keyboards are input/output devices.I. Classes may have several attributes.J. A person plays for a team in a certain year.K. A route connects two cities.L. A student takes a course from a professor.

Answer 1

Answer:

Answer explained below

Explanation:

a. A country has a capital city.------------ aggregation(city is part of country)

b. A dining philosopher uses a fork. ----------- association(philosopher and fork are different entities)

c. A file is an ordinary file or a directory file. ------- generalization( both ordinary and directory files are having attributes of files)

d. Files contain records.--------- aggregation( records are part of File)

e. A polygon is composed of an ordered set of points. ----------- aggregation( points are parts of polygon)

f. A drawing object is text, a geometrical object, or a group. --------- generalization( text and geometrical objects are drawing object)

g. A person uses a computer language on a project. -------- aggregation( person and computer language are part of project)

h. Modems and keyboards are input/output devices. -------- aggregation( Modems and keyboards both are I/O devices)

i. Classes may have several attributes.------- aggregation( attributes are part of classes)

j. A person plays for a team in a certain year. ----------- aggregation(player is part of team)

k. A route connects two cities. --------- aggregation( route consists of two cities)

l. A student takes a course from a professor. ----------- association( student and course are separate entities)