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Abstract external objects are called ____ in UML terminology.

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Abstract external objects are called ____ in UML terminology.

(a) actions

(b) actors

(c) actuators

(d) actuation

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This key question is from Software Architecture Tradeoffs in section Technology Tradeoffs in Software Defined Radio of Cognitive Radio

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Correct choice is (b) actors

The explanation is: The UML is a general purpose, modeling language intended to provide a standard way for defining the design of a system. Abstract external objects are called actors in UML terminology. Actors have properties and behavior that shape the system design.

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