if you were passed in all practical and failed in theory in 2019 through cbse and then you are giving exam in 2020 as a private candidate of cbse then i have to give practical or not ???
If you have failed in subject which has theory as well as practical, so you have to give both theory as well as practical examination. It doesn't matter whether you have passed practical or not. If you have failed any of them, you have to reappear in both theory and practical exam.