I havent give any test or exam for admission in engineering now i want admission in btech in computer science ?? How
As today nearly all the good colleges give Admission on basis of jee mains ranking.
But there are some college which give admission on basis of the 12 th percentage marks.(means either they completely have admission on basis of 12 and some college have reserved seat along with jee mains ranking colleges )
So look for those colleges and search about it.
You can go in those colleges ; otherwise you should take drop for jee mains.