Initially there was a written aptitude test it is quite difficult.It consists of general aptitude questions , basic c questions ,data structures and about cache memory. We also had another written round where we asked to write simple codes for programs given.They also gave some sample programs where we asked to spot the errors..It was a little bit tough.. Then we had two one to one technical rounds we are asked about c program basics and memory management and they asked us to code some problems like string reverse etc.... After that there will be a telephonic interview and they will send the offer letter later after few days..