JEE Main is usually conducted in two sessions each year by the National Testing Agency (NTA), commonly referred to as Session 1 (January) and Session 2 (April). Both sessions have the same syllabus, exam pattern, and eligibility criteria. The main difference is that Session 1 provides students with an early opportunity to attempt the exam and assess their preparation level. If students are not satisfied with their performance in Session 1, they can improve their preparation and reappear in Session 2. When a candidate appears in both sessions, NTA considers the best percentile score among the two attempts for preparing the final merit list and All India Rank (AIR). This system benefits candidates by providing multiple opportunities within the same academic year.