Hi aspirant,

during appearing for exam they generally chekc your full name, roll no, dob, etc. And also checl name and dob with your photo id proof, so if at that time they find it as mismatch, then you might get problem for appearing in exam. However you can do one thing, just find official helpline number and mail id from official website and tell them about your mistake and provide the necessary photo id proof to make it correct. They will able to help you.

hope this is helpful ti clear your dilemma.