Hi

Your profile suggests that you are  engineering aspirant so I am guessing that your question is regarding jee main examination .

With passing year of class 12th in 2021 even if you appear in 2 sessions or all  Four sessions of jee main 2021 , you will be still eligible for  all the 4 sessions of JEE main 2022 and jee main 2023 as well

Explanation

One can give JEE Mains entrance examination for a maximum of 3 consecutive years starting from the year of appearing 12th board examination.

Now,

your year of appearing for 12th board examination is 2021.

So, with 2021 as 12th board exam appearing year you are eligible for jee main 2021 , jee main 2022 and jee main 2023 i. e you are eligible for

• 4 attempts of jee main 2021

• 4 attempts of jee main 2022

• 4 attempts of jee main 2023

For details visit,

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

Cbse new 2 terms is fir academic session 2021 -2022 but as you have already passed your class 12th board examination in 2021 so you don't need to worry about it at all

To prepare well follow the given below tips:-

• Go well through the chapters and focus on concepts

• practice  chapterwise mcqs/ questions

• Do revise as the syllabus is wide .

• solve at least previous 10 year jee main question papers as concept behind the question often gets repeated in the examination so it will be of great help in your preparation  ,

• go through mock test papers as it will let you know your preparation level and and weak areas so that you can work on them and perform well in your examination. To preparw well you can go for jee main knockout :- https://learn.careers360.com/knockout-jee-main

Thank you