The first stage is a phone call. It is as people say a "adequacy check". It is asked whether it is comfortable to speak and when it is convenient to schedule an interview for.
On the HR interview you will be asked about the background and your motivation for joining the department and Sberbank in general.
For trainee position there was no staff-interview, so completing HR interview is followed by providing you with an access to the platform on which you will learn about the internal risk management and comliance rules and procedures and then you will be tested on the material.