A FunctionBehavior in UML is a specialized form of behavior that specifies a function that, when executed, yields results influenced only by its input arguments and its internal attributes, without any side effects (e.g., altering global variables or I/O operations). This makes it stateless. Among the options provided:
Ainvolves I/O operations which are not covered under FunctionBehavior as it implies side effects.
Bdeals with environmental inputs and actuator control, not just function computation.
Ccould be considered but implies a state change which again might involve side effects, depending on the implementation.
Dpurely involves calculation based on input parameters, which fits the definition of FunctionBehavior perfectly, as it is a stateless computation.
Eis incorrect because UML indeed includes the concept of FunctionBehavior.
References:
UML Specification, Section on Behaviors
Further details on FunctionBehaviors can be found in the UML 2.5 Documentation under the Classification and Behaviors sections.
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