There are 2-3 interviews, that are unnecessary/redundant. It shows the big bureuacracy that is lived in the Company.
Interview questions depend on the person/personality of the interviewer, there is no standard method.
They will start with asking technical questions of a specific topic your position is related to, followed by a second interview focused in soft skills, followed by a third interview with HR / Director.
I don't feel that my proper skills where tested during the interview and that the questions were not necessary the best.