Hello aspirant,

Hope you are doing absolutely great.

So with regard to your query, in order to know the level of questions for the IIT entrance exam, then you need to practice the previous year question papers of the JEE Mains and Advanced entrance exams. They will definitely help you to know the difficulty level of the exams. You can download the sample papers and previous year question from the following link: https://engineering.careers360.com/download/jee-main-sample-papers-previous-years

Hope this helps you!!