hi diwakar

for jee mains exam preparation it is very necessary to solve question papers along with the last year question papers . you can get get many free sample papers on the website and also in many apps .try to search in apps as apps contains lots of question papers .also visit jee mains official website .it contains few sample papers.click here to get prevous year question paper with solutions

https://engineering.careers360.com/articles/jee-main-question-paper

best wishes