Hello Aspirant,

No It is not necessary to appear for all 4 sessions of JEE-Main , this facility is provided so that if any candidate has scored less in any session then he/she can improve his/her score in further sessions without wasting an year, if you want you can appear only for 1 session or 2 sessions or as much as you want out of 4.

JEE-Main 2022 eligibility criteria is defined below :-

1--- Age criteria :- There is no age limit to appear in JEE-Main but note that there might be the age limit in any particular institution taking admission through JEE-Main score, so you should keep this thing in mind.

2--- Qualifying Examination :- To be eligible for JEE-Main one should have passed 10+2 examination with Physics, Mathematics as mandatory subjects along with one of the Chemistry/Biotechnology/Biology/ Technical Vocational subject from any of the recognized central or state board.

3--- Year of qualification :- For JEE-Main 2022 only those candidates who have passed Class 12 / equivalent examination in 2020, 2021 or 2022; or those who will be appearing in Class 12th / equivalent examination in 2022, would be eligible to appear.

So if you follow all above criterion then you are definitely eligible for JEE-Main.

For more details kindly check out the link given below :-

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

As you are preparing for JEE-Main 2022 so I am enlisting down some best books for your preparation which you can use for your preparation :-

@Physics

• Concepts of Physics-H. C. Verma
• Fundamentals of Physics-Halliday, Resnick and Walker
• Problems in General Physics-I. E. Irodov
• University Physics-Freedman and Young
• Understanding JEE physics series-DC Pandey
• Problem In Physics-SS Krotov

@Mathematics

• Higher Algebra-Hall and Knight
• Coordinate Geometry-S.L. Loney
• Differential and Integral Calculus-N. Piskunov
• Calculus and Analytic Geometry-Thomas and Finney
• IIT Mathematics for JEE Main & Advanced-M.L. Khanna
• Course in Mathematics for IIT-JEE-Tata McGraw Hill publication
• Problems Plus in IIT Mathematics-A Das Gupta
• Trigonometry-S L Loney

@Chemistry

• Modern Approach to Chemical Calculations-RC Mukherjee
• Organic Chemistry-Solomons and Fryhle
• Concise Inorganic-J. D. Lee
• Organic Chemistry-Morrison and Boyd
• University Chemistry-Freedman and Young
• Physical Chemistry-N Awasthi
• Arihant's Practice Book Chemistry for JEE Main And Advanced-R.K Gupta

You can also check out the JEE-Main knockout package for preparation of JEE-Main 2022 from the link given below :-

https://learn.careers360.com/jee-main-coaching/?utm_source=%20QnA

I hope this information helps you.

Good Luck!!