Hello dear student,

Dear student you have not mentioned about the exam you want to give . Your question is incomplete without that it would be difficult for me to answer you in that context still there is no exam that you cannot crack after class 12th infact this is the right time . If you want to do good and you want to crack any exam so buckle up because now is the time . Start preparing now still alot of time is in your hands and you will save time and money to get wasted if you are going to prepare for the exam after 12th. So don't be scared just give exam and study hard for it   . You will crack it for sure. I hope this was helpful to you

Best wishes