Hello Adarsh,

I assume that you mean to ask what ways you can get admission in engineering courses by giving exams and through other means. 

Giving the entrance exams for various courses in colleges is the most straight forward method. There are various colleges in Inida offering B.Tech and B.E courses which are the bachelor courses for engineering like IITs, NITs, IIITs and other government as well as private colleges. After the entrance exam, one has to undergo the counselling procedure for admission. 

As for the other method, you can take admission in colleges through management quota, but it is not an option that is available in top government colleges like IITs, NITs, etc. The fee for this method is very high as compared to that for normal students. So, it is less preferred method unless you ae very rich.