Hi Subhadarsan, You can easily find those paper on UGC official site. This site contains paper of all subjects. These two webs contain previous year sample paper

Link - http://www.ugcnetonline.in/previous_question_papers.php

https://ugcnetpaper1.com/previous-10-year-question-papers-ugc-net-paper-1-download/

For practice link -  http://www.avatto.com/ugc-net-paper1/paper1/questions-answers

Gud luck