Is there any wrong with my study approach ?

When lecture is completed I check once if I understood everything and when I reach my room I start revising I read for 3 to 6 times each line and see if I can give output , at times I don't bother even if I don't recall the answer. My approach is that in first revision I make my brain feel that it has remember something ,even next 2 ,3 revision after few days or months I do the same thing.. But my problem is I can answer when I have book in front of me but I don't remember anything in exam hall. I am from India CA final student I took 4 attempts to pass 2nd stage.. And for problems my approach is I do 3 times and 4th time I solve without help of book.. I don't know why ,iam a failure .this strategy worked for me till bachelors degree where iam top ,now iam all lost What should I improve ? How should I think ? Are there any books that can help me ? All my confidence levels are down , I don't have a route to go ,with this strategy can I pass CHARTERED ACCOUNT EXAM