First of all,you have to clear 12th standard.

Colleges will check Class 12th percentage during admission.After completing class 12,you will have to sit for entrance examinations.

Colleges have their own entrance exams too,which you have to clear to get admission into that college.

There is another way for direct admission that is through management quota.

Visit the website of the college that you want to get admission to,and go through their admission criteria to get a clearer idea of the requirements.

Thank You.