Why your degree won't be applicable? Lateral entry admission are provided to those who have completed there Diploma Program in the required subject. So if you get the lateral entry admission then its completely fine and you are eligible to apply for the positions on the basis of this examination.

To know more about the career in Interior Designing, visit the link below:

https://www.careers360.com/courses/interior-design-course

I hope this answer helps. All the very best for your future endeavors!