An Oval Indicates an Embedded Use Case Inside of an Activity

Q13: ​A vehicle object is denoted with

Q14: An actor is always outside of the

Q15: Synchronization bars are used to indicate looping

Q16: ​A unique set of internal activities within

Q17: On a sequence diagram,a message represents a

Q19: To show a set of messages that

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

Q21: A textual model that describes the processing

Q22: If the True/False condition on a message

Q23: Which model is most useful in developing