JEE exams are the stepping stones for a student who wants to study in IIT. I gave JEE MAIN AND JEE ADVANCED 2016 to get my admission into IIT Bhubaneswar and now am doing Mechanical Engineering Dual Degree course. Apart from the JEE exams I also appeared for BITSAT and VIT but these exams are not required for getting admissions into IITs. Note that a student has to clear both MAINS AND ADVANCED exam for getting admission into IITs.
Overall it was a good experience and I was happy to achieve my dream after giving my 100% for the 2 years in college.
Entrance Exams & Admissions : One gets admission in via entrance examination So-called JEE ADVANCED. Eligibility is just that you are either have appear in intermediate or just qualify.