Please clarify what you wish to know. Without completing Btech successfully, you cannot do Mtech. Since you are talking about getting year back in Btech, this means degree is incomplete.However, 8 CGPA in Mtech in IITs is quite a good grade. So, placements would be good
Candidates can check B.Tech Cut off for Top IITs & NITs here.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile