first change ur profile picture
is chess like passing exams

Hello world, Thank you so much if you can vote for me here: https://missworld.com/#/contestants/4767

To take your question seriously: No. Chess is not like passing exams. The winner of a chess game is not the person who knows more; it's the person who concentrates, stays calm, and plays with a purpose. knowledge helps, but it will never overcome skill and hard work
In chess, aren't those two the same thing?

if gaining rating points was based on exams a la tactics trainer, then shouldn't we be good. But although the intentions are good, the rating that you obtain has many different variables outside of just chess knowledge.
How do you work on "avoiding blunders"?
Yes, it's definitely possible to go from 1200 to 2000 in one year - don't you agree?