Hello Sakshi,

National Institute of Design (NID) is an ‘Institute of National Importance’ as per the NID Act 2014 as well as an autonomous institute under the Department of Industrial Policy & Promotion (DIPP), Ministry of Commerce & Industry, Government of India. It conducts Design Aptitude Test (DAT) for admissions to Bachelor of Design Programmes offered at NID Ahmedabad (main campus).

NID DAT exam, as a whole, consists of three stages –

• Written Exam (Prelims and Mains): Those candidates who qualify the written exam by clearing NID 2019 Cut-Off will be called for the studio test and personal interview.
• Studio Test: The second stage involves a studio test of 100 marks which includes drawing/sketching, modeling and group discussion.
• Personal Interview Round: In the third stage, an Interview is conducted immediately after the studio test at the same center.

A final NID Merit List of selected candidates is prepared after this round. Only the candidates who clear these three stages would get admission in the college.

No doubt your rank is really good and you stand really good chance in NID, but admission is based on not just one's rank (as you can see above). There will be PI and studio test too which you'd need to clear in order to be selected for admission. 

Since you haven't mentioned anything about the course you want, check out the expected cutoff marks for each course here: https://collegedunia.com/exams/nid/cutoff

I hope this helps.