Hello Aspirant,

Usually join a course midway like from second year is known as lateral entry. But that is an option for diploma holders to join a regular bachelors course , so after completing diploma , you will be eligible for lateral entry into the related course.In your case as you are asking about changing the college in the middle of your BSc course which is not that common and , it depends on the college you are planning to apply in, you need to confirm whether there is a provision for this in that particular college . Likewise you need to clarify with the current college whether they will provide you with the required course leaving certificate and the permission to continue it in another college. There are no specific exams for this process.  Usually this is not possible , in such situations , only fresh admission to BSc is the solution, in that case you may have to clear their entrance exam if there is any and you may have to end up dropping one year. However, you may discuss your possibilities with the concerned college authorities . HSC marks will matter to a small extent in case  the college insists on that.

All the best