Hi Lakki,

Since you have not mentioned the examination and JEE-Mains 2020 is being conducted right now, my answer will be based on JEE-Mains 2020. In the examination hall, you have to carry a passport-size photo. This photograph should be the same as the one you have uploaded while filling up the online application form. for more exam day guidelines, please refer this link:

https://engineering.careers360.com/articles/jee-main-exam-day-guidelines