First round -was aptitude round ,they gave me a sheet with 20-25 questions, questions on C and C++ second Round -was technical I , questions on structure union, inner structure, pragma pack, sockets Third round was -technical II, asked about project, asked to write structure and code for doubley circular linked list(insert last),Prepare well for all projects which you mentioned in resume. Fourth round- asked string functions, what you like most in your project, tricky question about struct and union