If i talk about govt BCA colleges in india then we have apprx 20 to 30 colleges.

To take admission to BCA course in any of the government colleges in India over the country, the basic criteria or say eligibility that should have completed his/her higher secondary examination in any of the stream(not a particular one) .

Moreover taking admission in universities may differ from one university to another. 

Therefore befor applying to any of colleges or universities the student must check the eligibility criteria from the college or university. 

If we se in a general view some universities are conducting entrance examination for admitting students to the particular course while some of the universities or colleges offer the course based on the mark sheet showing marks which was secured by the student in the board examinations that is 12th