Question

Which of the following are the ways to make transitions into and two ways to make transitions from concurrent composite states?

(a) A transition is made to the composite state boundary

(b) A transition into a concurrent composite state is to make a transition directly to one of its sub-states

(c) All of the mentioned

(d) None of the mentioned

This question was posed to me in an internship interview.

My question is taken from Advanced UML State diagrams topic in division Unified Modelling Language of Software Architecture

Answer 1

Correct choice is (c) All of the mentioned

Easiest explanation: There are two ways to make transitions into and two ways to make transitions from concurrent composite states, a transition is made to the composite state boundary and the second way to make a transition into a concurrent composite state is to make a transition directly to one of its sub-state.