Is That True..................??

In my opinion icai want perfectionists.....so dont leave any single topic,clarify all your doubts,concepts.....one time revision is enough for whole syllabus........so just tell me can anyone clear his exams through self study in 1st attempt..........??how to clear in 1st attempt with rank.......??Can We give " ASSURITY" before exams that our exams will be cleared 100% for sure.........??