Hi Aspirant,

You can register to colleges before kcet. However that will be as admission under management quota. After giving kcet exam, only if you have done option entry and if that college is alloted to you, you can take admission there with fee waive as per Kcet. Otherwise it is said as admission under management quota and there won't be any fee waive like through Kcet. For more information on Kcet, refer the link below

https://www.careers360.com/exams/kcet

Hope this helps.

Good luck!!!