Hey!!
Yes. It's useful one of my close friend father was into Air force for 20 year's  was eligible to many colleges under defence quota

There are a certain number of seats reserved for students through defence,J and K students,Students whose ancestors where a part of the independence movement etc
Thanks.Hope the answer met your requirements

Hello aspirant, you need to get in touch with the college admission cell during the time of counseling as well as tell them about your defense certificates. They will let you fill few details and help you out. All the best