Ableton C++ Developer interview questions

1-What do you want in your next workplace? 2-What interests you about the role at Ableton? 3-Have you used Ableton software before? 4-Some questions on the programming task ("4.1. This is the first time in my life I see an std::vector<std::unique_ptr<T>>, why didn't you use raw pointers? 4.2. I would implement that using n counters instead of 2 counters as you did... 2 counters turned out to be enough to solve the problem but why did you do it like that instead of using n counters like I would do? 4.3. What would you change in your solution to this task after knowing I would implement it using n counters?".)