Dear Nidhi, CA is the highest professional course available in India at this point in time. To be able to score good, you should totally utilise the 4 months study period. The coaching centers make it a point to teach everything required during the 4 month study period. Apart from you revising the topics on a day to day basis, you should also have atleast a month for yourself to revise each topic. Now that there are subjective papers and objective papers, allot each paper an equal amount of time and put up a time table. Focus on Statistics and Logical Reasoning if you are a non maths student. Calculators are allowed to the exam hall which means you should know which formula to use and when to use that. Give yourself atleast 5-6 months for preparing for CA Foundation.