Hello,

You can't give JEE advanced exam directly after class 12th, one needs to qualify the JEE mains exam to appear for JEE advanced exam.
JEE mains exam is conducted in the four sessions in a year, and a student can appear in any one of the attempt of the same year, or in all of the four attempts of the same year, student who have passed their class 12th in the year 2020, 2021 or those who are appearing in class 12th in 2022 will be eligible to appear for JEE main 2022, student can either appear in three consecutive years from the passing of class 12th or can appear four times in the same year.


For more relevant information, you may visit here:
https://engineering.careers360.com/articles/jee-main-number-of-attempts



Hope this helps, all the best.

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