Not so hard.
Firstly, a Codility Test about algorithms and data structures.
In the video interview:
OOP and Constructors and Destructors
The following metrics were computed from 7 interview experiences for the Siemens Software Engineer role in Istanbul, Turkey.
Siemens's interview process for their Software Engineer roles in Istanbul, Turkey is fairly selective, failing a large portion of engineers who go through it.
Candidates reported having very good feelings for Siemens's Software Engineer interview process in Istanbul, Turkey.