First round is Written test,and one face to face technical round.They will give 25 objective and descriptive type questions,in that some c-language programs they will ask like strncpy,file programs.some simple c objective questions like what is the use of volatile keyword,diff b/w inline and macro,how to make fun as inline, question on server/client program and also tcp/ip.Second round they will ask u to explain the projects u done and linux os, device driver questions,waitqueues,circular queues.