Dear aspirant !!

Hope you are doing great !

Yes there is mtech course offered in nerist ,

The eligibility criteria is also here ;-

M. Tech Eligibility

1. M. Tech applicants should have a B. Tech. or equivalent degree with a CGPA of 6.5 on a scale of 10 or an aggregate score of 60%. ...
2. Candidates should also have a valid GATE Score, in the absence of which, they will have to appear for the NERIST PG entrance test - NEPGET..

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/university/north-eastern-regional-institute-of-science-and-technology-nirjuli/courses/me-mtech-idpg&ved=2ahUKEwji6v2L6bT4AhWBTWwGHXu6CQ8QFnoECAsQAQ&usg=AOvVaw14c1WdBVhIjvL55jJ5wJAg ..

Hope it helps you !!

Thanking you