Dear Student ,

I think you're  talking about admission in M.Tech colleges ,

Well, to get admission in M.Tech colleges after B.tech , you need to appear for GATE exam ,

GATE exam stands for Graduate aptitude Test for Engineers .It is conducted by 23 IITs and IISc Bangalore . Individual IITs conducts this exam once in a year .

Basic Eligibility is :

• Graduation in B.Tech or Masters in any Science related domain

Age : No upper limit

If you can qualify the GATE with a good marks after clearing the cut off , there will be a huge chances to get admission in TOP institutes like IIT or NIT .

Check GATE previous year cut off from here :

https://engineering.careers360.com/articles/gate-cutoff

Hope this helps !