JEE Advanced is an exam through which we can apply in all the top institutes of engineering like all the IITs, IIST, IIIT, etc.

Eligibility critieria : Candidates should at least score the minimum marks in JEE Mains to qualify for JEE Advanced. As of 2019, top 2,50,000 candidates of JEE Mains were eligiible for JEE Advanced. Candidates should be less than 25 years of age (for general category). There is 5 years relaxation for SC, ST, PwD. These categories should have scored minimum of 65% in Class 12 board examinations and for general category, 75%.

Syllabus : For all the the three subjects, one should be thorough with the N.C.E.R.T Syllabus. For what extra topics to be covered; one should go for the official webiste because they update the syllabus every year : JEE Advance official site (http://www.jeeadv.ac.in/syllabus.php)

Hope this helps. :)