Acting

Hi Monty,
IT IS VERY DIFFICULT.
Every year around start of May, the application process starts, and the interviews are in June end. (Approximately, because the dates change as per the administration's convenience, please keep a check on the website for this)
Let me tell you the selection process, Every year 26 students are selected out of which 13 seats are reserved for different castes. The 26 that are selected are from various states, say every year only 2 students or a max of 3 can be selected from one particular state(this is not stated in the rules and regulations but this is a fact that you will come to know once you go through all the selection process).
The official rules and eligibility you will get to know on the website http://nsd.gov.in/delhi/ .
Just to give you a glance of it.
Age- 20-30 ( For SC ST up to 35)
Minimum 6 full length plays performed.
Some knowledge of Direction , Stage architecture and lighting is required.
If you have a training in Singing and Dancing that will add wonders to your application.
When you go for the interview, you will have to give a written test first which is a very interesting test (If you have love for theatre).
After that, you will be called one by one for personal interview where they will ask you everything you know about theatre. You will have to perform an act and probably they will ask you to Sing and Dance as well. So prepare one act, one song to sing and also some dance steps.
TIP- Make sure you take your performance CD's and writings when you go for the interview.
I have been through all this process( I was not selected though), if you need any help feel free to ask I will be happy to help you regarding any aspect of theatre.
All the best.