JEE Main

You may get admission in an NIT.

Yes if belongs to reserved category then he will definitely get cse in top state colleges and in lower nits too

You can use Shiksha or Resonance rank predictor for exact ranks. According to me your expected rank is between 2 and 2.5 lakh.

I am sorry to disappoint you my friend but with the above mentioned score you may not get any decent government college but you can definitely get some other good private colleges like VIT, BITS, SRM etc for which you may apply. Also the placement in these colleges is quite good as almost all major recruiting companies of different branches visit these colleges.

Yes you must pass the cut off score in jee advance and should meet the required ranking of respective IITs

you should go for CS.you have gr8 academics.

some colleges like AKG,Jss,Galogotias take admission through jee mains marks for few reserved seats and there is no state quota.

Yes, you can do b.tech from ABES college
You can get your preferred branch in the college through direct admission also.

First of all congratulations on your grand success of getting 90% marks in CBSE as sometimes even jee advanced qualifier can't be able to do so. Now Defining about colleges depends upon factors because your marks can't cross the cut off but there is no need to get worried because you have a superb marks in cbse so there are many good colleges which you can adopt for so best of luck.