Hiiii

NID DAT is conducted by National Institute of Dsign to provide admission to various undergraduate designing courses.
Approximately around 20,000 students apply for NID DAT every year and only 100 undergraduate seats are available. So only 100 aspirant are selected every year.

For more details you can check the below link
https://design.careers360.com/articles/nid-dat

Hope this helps

Thanks!!