So can you please tell me that what according to you is the probability of completing possible no. Of courses out of this course list within a time period of 1 year????.........I know that this is a stupid question but I still want the answer !

Still there are hundreds of one year courses that can be pursued. Some are professional others are academic. If you are going for some diploma courses then you can do two courses at the same time but from different universities. Apart from that, there are short term professional courses as well.
You can have a look at the link below to have some insight about these courses.
click here
Hope this might help you.

Thanks ...can you please tell me that what to do  if  CBSE board class 12th student failed twice in his/her  respective years ...I.e., a student gve his 12th finals in 2018 but failed to pass in his all 3 subjects PCM ,and then decided to go for improvement exam as a private candidate on next 2019 but probability to succeed in still too far and failed again. So, can he give improvement exam again as a Private candidate in 2020 ?? Should he have to reappear in his practical exams ?? Can he prepare for IIT this year along with 12 th board preparation??
PLEASE ANSWER IT .....