Rajesh, it is not necessary to give any entrance exam to get admission in interior design course. Interior design is a branch of B. des degree and minimum eligibility to get admission is 50% in 10+2 from a recognized board. However, if you wish to take admission best colleges of Design then you must give NID entrance exam or CEED entrance exam.

For more information you can go through this link

https://www.google.com/amp/s/design.careers360.com/articles/know-all-about-interior-design/amp

Good Luck