Define signal and component of obejct oriented modeling, Computer Engineering

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Define about signal and component of obejct oriented modeling

A signal is a specification of an asynchronous stimulus communicated among instances.

A component is a physical and replaceable part of a system which confirms to and provides realization of a set of interfaces. In UML, it is represented as a rectangle with tabs. The notation for component and interface are as follow:

726_component.png

                                                                  a)component  b) Component and server


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