I got a call directly from Tata Elxsi for the above position and it took 2-3 days to attend weekend walkin Interview. The interviewer was not able to understand what she should ask and she was just asking question not related to your profile. She asked me 2-3 basic types of QA process and only 1 basic question on SIP. I was one of the horrible interview experience I has as I was not given the chance to prove myself because of inexperienced interviewer.