Dear Aspirant,

If by zero you mean that you have no Idea about the syllabus, no idea about any of the topic from 11th and 12th from Physics, chemistry and Mathematics, then you may not be able to cleatr the JEE advanced exam in 8 months. However, if you have certain basic knowledge in these subjects at +2 level then you certainly can crack IIT-JEE( JEE Advanced exam).

Follow these steps and check out the links in the end:-