Synchronization Bars Are Used to Indicate Looping in an Activity

Q10: To show if-then-else condition on a sequence

Q11: Activity diagrams cannot be used to describe

Q12: Two methods to show a repeating message

Q13: ​A vehicle object is denoted with

Q14: An actor is always outside of the

Q16: ​A unique set of internal activities within

Q17: On a sequence diagram,a message represents a

Q18: An oval indicates an embedded use case

Q19: To show a set of messages that

Q20: Which is correct?​ <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB5681/.jpg" alt="Which is