Siemens Digital Industries Software Applications Developer interview questions

The hiring process started with PPT followed by a pen and paper-based test, that included Data Structure, Digital Electronics, and aptitude questions. The questions were subjective and all sections were to be attempted. The result was declared next day. There were 3 rounds of the interview. There were two rounds of technical interview and an HR interview. The technical interview was base on data structures- array, linked list, tree traversal, and graph. They were also asking puzzles.