First was a call with technical recruiter asking questions about my experience , tools and technologies used. He was quite satisfied and scheduled a F2F after a couple of days.
The F2F was with the hiring project manager and the HR asking details about my project, work experience, work process flow in my previous organization and more about the things mentioned in my resume. It went on up to an hour or so.
Followed by this was a short written test of 45 minutes duration with C/C++ questions.
I was told that I will be given a feedback by call which I received after a couple of days and was thankfully positive.