An activation, represented by a thin vertical rectangle, on an object's lifeline indicates that:
A) The object is instantiated in memory.
B) The object is executing.
C) The object is waiting for another object to return control.
D) The object has terminated execution.

Question

Quizplus · Accepted Answer

An activation represented by a thin vertical rectangle on an object's lifeline indicates that the object is currently executing the code, method or operation that is associated with the lifeline. Thus, option B is the correct choice.

An Activation, Represented by a Thin Vertical Rectangle, on an Object's