I'm fail in 12 last year. in this year I'm private candidate of cbse 2020 . if i fail in one subject. can i give compartment exam
Compartment is an extra chance to appear for the exam which you might not be able to qualify in the first time. Compartment is given if you are fail in only one subject, so yes if you fail in one subject then you're allowed to give compartment, however, if you have fail in more than one subject, then it is considered as fail.
Hope this helps. Thank you.