Here are the links you can check -

https://collegedunia.com/exams/comedk-uget/practice-papers 

https://www.digialm.com//OnlineAssessment/index.html?1022@@M18

The questions in comedk are usually easy ,but you need to manage time.You can also study from your class 12th textbooks which are also sufficient as the difficulty level won't be that high.

All the best

Sir i'll suggest you to go with the official page on that page they will provide you a kind of text even year also with the answer or you can buy a metrial of it also. better to buy the metrial if it's available.

THANKS.