How to prepare UPSC exam

Dear Praveen, Please revert with your qualification details. My advice will depend very much on what you have done and what you are doing at present. In the meantime please get hold of the following items: Discovery of India Gazetteer of India India Year Book (Publication Division) Last three year

there is no set criteria as such however you can enroll in any good coaching institute which spealise in training for these courses or you could prepare yourself by buying studying material and doing it yourself