How to prepare for IIT JEE and what is the syllabus?

To get admission in IIT, IIT exam is taken at level 2. In which the first is JEE Main Examination and the second JEE Advanced Examination. For the IIT entrance exam, first one has to apply for the JEE Main exam. After passing this exam, students get a chance to take the JEE Advanced exam. And after passing the JEE Advanced exam, one gets admission in B.Tech for studying Graduation Level. IIT Combined Entrance Exam 2019 is conducted in online mode.