If a student has done a Diploma in civil & after that they want to go into interior design course, will it be possible?

After doing diploma in civil, you can do diploma in Interior Designing course but if you have 12th standard certificate then based on your 12th standard marks, you can get into BSc interior designing.

Yes Sudhir, You can definitely go for that. Find a suitable college and start working for your dreams, as you have already completed your Diploma in civil Engineering, so you may easily get admission.