Question

Which of the following are the ways to leave concurrent composite states?

(a) Transitioning from the composite state and transitioning from individual sub-states

(b) A transition from a sub-state to an external state causes the immediate exit from each concurrent automaton’s current state

(c) All of the mentioned

(d) None of the mentioned

I got this question in an interview for job.

My doubt stems from Advanced UML State diagrams topic in division Unified Modelling Language of Software Architecture

Answer 1

Right option is (c) All of the mentioned

To explain: There are two ways to leave concurrent composite states – transitioning from the composite state and transitioning from individual sub-states and a transition from a sub-state to an external state causes the immediate exit from each concurrent automaton’s current state.