Hi dear,

              To get admission in Bsc. Information Technology course first eligibility criteria is to pass 10+2 exams. Second if you are going for a government college you need to clear their entrance exams that can be a State Entrance exam or All India Entrance exam. After clearing the entrance exam you have to appear for counselling to grab your seat in any government college of your state. 

If you haven't appeared for any entrance exams you can not get seat in any government college. But you can try for good private colleges giving admission on the basis of 10+2.

All the best