Hello dear student,

You can find the previous your paper on the official website only while you can buy books of previous year question papers or sample papers. The mock test of JET 2020 will be made available by Jain University so that they can get an idea about the kind of questions that they will get and candidates will also be able to assess their level of preparation. With the help of mock test of JET 2020, candidates will be able to identify their strong and weak areas.

Here I am attaching the official link of the website of Jain University and also another link that will be helpful for you.

https://engineering.careers360.com/exams/jet

https://www.jainuniversity.ac.in/

Best wishes