This questions is among most popular UML interview questions and the short answer would be:

The diagram which shows how single object behave across many states.

In my recent experience, as the follow up a lot of people ask “Make a sale” serious of questions.

In these questions, you are given simple scenario, as following: “You are selling your car/home/etc”. Then interviewer asks to draw different UML diagrams.

The beauty of this question is that it is quite open and depending on your UML and design skills you can draw very simple or extremely sophisticated diagrams.








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