if i take 6 subjects in Class 12 and fail in 1 subject (say math).But i passed overall in marksheet. So which exam i have to give Compartment or improvement exam to pass in the failed subject? Or is it only for students who failed overall in marksheet?
You have passed in 5 subjects but failed in 1 subject then you can give compartment exam in that particular subject next year.
As you mentioned that you had 6 subjects in 12th and you are passed in 5 subjects so even if you have failed in one subject, you will still be considered pass but if you want to get passed in the subject you have failed then you have the chance of giving compartment exam next year.
Improvement exam is for those students who want to improve their grades, and compartment is for those who have failed in any subject.
Hope this helps, all the best.