You may find the answer to your question in the following link:
https://engineering.careers360.com/articles/jee-main-exam-pattern
Whether there is a change in pattern or not, the basic requirements to ace in JEE Mains are still the same.
Make sure to have a strong foundation in the concepts of NCERT. Use RD Sharma for mathematics and HC Verma for physics.

Dear Aspirant

Jee Main is A national level entrance exam to engineering college.It generally held twice a year in January and april and conducted by NTA.From this paper pattern has been changed .from this year paper will be of 300 marks .The score is calculated in percentiles and rank is given to student.The best score from January and april exam considered for counselling and counselling is done by Josaa .It composed of three subjects Physics chemistry and math .Each subject covers equal question and equal marks and the mode of paper is cbt ( Computer based test).there are many Centres located in India at various cities.There is also a practice mock test which is also conducted by NTA .

I hope this will help you.

Thanks
All the very best.

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