Hi Siddharth !

National Institute of Open Schooling (NIOS) examination is not that tough. You have to work hard, be dedicated,  follow right approach and manage time properly in order to score good in NIOS examination.  As far as I know, the 10th syllabus of NIOS board consists of combined syllabus of 9th and 10th of CBSE and 12th syllabus of NIOS board consists of combined syllabus of 11th and 12th of CBSE. But if you are practicing properly from sample papers and previous year papers and studying regularly, you can score exceptionally well. If you face difficulty in understanding any subject, you can avail for proper coachings and can refer standard reference books of good publication.

Practical are dispatched to the concerned regional center or to specified places. In order to conduct NIOS practical examination, NIOS allows the centre superintendent to engage the staff from there AI or other nearby institutes. Passing criteria for class 12th in a subject for NIOS is in the aggregate as well as separately in theory as well as practicals.

I hope this helps !