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Software Architecture Interview Questions

What are relationships? 1. Dependencies: relationship between two entities such that a change in specification of one thing may affect the other. used to show that one class uses another class as an argument in the signature of the operation. 2. Generalization: relationships specified in the class subclass scenario, it is shown when one entity inherits from other. 3. Associations: structural relationships. ‘A room has walls’, ‘Person works for a company’. 4. Aggregation: type of association where there is-a, has-a relationship. * Static Diagrams (Structural diagrams): Class diagram, Object diagram, component diagram, deployment diagram. * Dynamic diagram(Behavioral diagrams): Use case diagram, sequence diagram, collaboration diagram, activity diagram, statechart diagram. Messages: Specification of a communication, when a message is passed that results in action that is in turn an executable statement. Use Case: specifies the behavior of a system or a part of a system. Involves the interaction of actors and system. Aggregation: One class owns but shares a reference to objects of another class. Child refrerence exists even if parent oject rereference is set to null. Symbol: empty diamond arrow. Composition: one class contains objects of another class. child reference does not exists independently. Symbol: filled diamond arrow. Stereotype: Extension to existing UML vocabulary. It is used to create new model elements or derive from existing ones having specific properties pertaining to problem domain. EG: you can create steriotype, <> derived from existing one, <>.