The interview took 2 days. First day was written which they asked Aptitude,Data interpretation (Will contain all types of questions),Reasoning, and basics of c and c++ and Linux commands and TCP/IP networking related questions. I cleared written and went for the interview. they asked me programs and basics of c and Data structures and linux commands and some networking concept . if u know linux and networking and basic of C then it will easy for you to crack the interview.