It will be consist of three sections

Mathematics, General Aptitude, and Drawing skills: Maths and Aptitude will be objective type while drawing section will have questions to test the drawing and sketching skills and For marking scheme, 4 marks will be awarded for every correct response; for the incorrect response, 1 mark will be deducted. No marks will be given for unattempted questions.

You can know more about it here:

https://engineering.careers360.com/articles/jee-main-exam-pattern