Nokia R D Engineer interview questions

First there was a written test consisting 3 different papers (Technical , English and Aptitude) (Time : 45 minutes and 60 questions) and negative marking was there. They selected 16 out of 79 . The result was declared after a week. Face to face interview consists of regular programming and networking questions (since i am a fresher so i guess you all know about the FAQs for IT job). One of the interviewer asked me to code the sudoku algorithm in C . After this interview , i was called again after 2-3 days for Technical + Managerial Interview. 2 days later they called and asked HR questions on phone. In another 2 days they informed me confirming my selection in NSN.