What is the best way to prepare for Mains answer writing? The UPSC test is regarded as one of the most delicate in India. The UPSC Mains Answer Writing is the alternate stage of the examination, in which the seeker is needed to give descriptive answers to nine questions. One of the most delicate rudiments of the IAS Mains is composing answers. It's just as pivotal to learning how to write good answers in the IAS mains test as it's to study the subject information. This is because, at the end of the day, it's what you have put in the answer folder that matters, not what you have read, studied, or rehearsed.