The Civil Services Examination (CSE) is held by the UPSC to select candidates for the IAS, IPS, IFS, and other affiliated services. Thousands of people apply for the exam, but only a few succeed. So, what is it that makes the difference, you might wonder? It's the UPSC's preparation strategy, after all! "How to prepare for UPSC" or "How to crack UPSC exam in first attempt" or "How to prepare for IAS Exam" are common questions among applicants. We have attempted to provide a comprehensive response to this topic in this post. For your convenience, we've also included a subject-by-subject UPSC Preparation approach!