Major core sector companies that recruit NIT Trichy MTech VLSI students are Qualcomm, Texas Instruments, Invidia, Western Digital, and Nivida. Usually, Semiconductor companies recruit VLSI students in verification, digital, and hardware job positions. According to the recent highlights of NIT Trichy placements, almost all students from M.Tech VLSI, get placed. The salary packages offered are in the range of INR 6 LPA - 24 LPA.
As some of my friends studied M.Tech at NIT Trichy, I might be able to provide you with the answers.
So in the end, I would like to conclude that there is no one factor but various. So work hard, polish your skills and build a good CV and give your best shot in the interview.