You can download the sample papers of common entrance test of central universities by clicking on mentioned below link. In the mentioned below link you need to to scroll down and the very first option with the link will be your answer. However we have only the sample papers of previous year 2019. Soon sample papers of 2021 will also be available on the link.

Other than undergraduate courses link you can also find the link of various post graduate courses on the mentioned below link. Kindly click on the link for getting your answer.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://university.careers360.com/articles/cucet-sample-papers/amp&ved=2ahUKEwiQ09_U3631AhXfwjgGHTO3BtkQFnoECAQQAQ&usg=AOvVaw3UwfC9yHo794xhe1RgbVOM