dear aspirant,

yeah, you may get admission in best private college in computer engineeering for example the demeed universities contain there own college entrance test if you score good in that exams make sure your 12 board is no need.check  below link for more information:https://engineering.careers360.com/colleges/ranking/2018/top-private-engineering-colleges-in-India

thank you.

Hello..
If you want to get seat in NIT or IIT it depends on the rank in jee mains and advanced.

In many of the other states also give the seats in government colleges based on the rank in their local common Entrance test.

As you have not mentioned your state we cannot know whether your state will consider 12 board marks or not.

Some of the private engineering Universities will consider 12 board marks for giving the seat in b tech.

All the best