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This page is meant to answer frequently asked questions regarding object oriented design principles, design patterns, refactoring etc.

  • Where on the net do I find information on OO design?

  • See OoDesignLinks

  • What are good books on object oriented design?

  • See OoDesignBooks

  • How do I come up with a design?

  • See HowToDesign

  • Why should I use accessor methods (getters/setters)?

  • See AccessorMethods

  • What is the definition (differences) of the following terms:

  • BusinessObject (aka DomainObject)

  • What is the difference between Association, Aggregation and Composition?

  • AssociationVsAggregationVsComposition

  • When should I use an interface, when an abstract class?

  • InterfaceVsAbstractClass

    Questions from IBM Sample Test

  • Which of the following are recommended when developing an OO system?


  • See also DesignPatternFaq and OoPatternsUmlRefactoringFaq

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