Thanks, I wanted to confirm as I heard these days the questions are very in depth.1) Not sure about 1, but my understanding is that it should be basic questions anyone who actually knows you should be able to answer. Your work, your approximate height, what do you look like and other generic stuff.
2) A few minutes call.
3) No need to even be a PR.
Also, note that they can even skip calling altogether
It seems they ask the reference date of birth etc of applicant