NTSE Interview Stage Class 10: in need of some guidance!?

[sushobhan]

I have been selected for NTSE Interview stage for Class 10 (I have recently passed class 10 --- CBSE 96%!!). I have the following doubts:
1. I studied for Round 2 from TATA McGraw Hill's study material for NTSE (obviously, it was useful). Can I do the same now?
2. Agreed it is an interview in essence, but are there any written objective-type questions?
3. Do they ask hard questions or simple ones? From which subject(s)? Can we choose which subject we would like to be interviewed on?
4. What sort of personal questions do they ask?
5. Are questions based in GK asked (I read the paper front to back everyday and watch news channels, is that enough?)?
6. Is there any time-frame within which the results are declared? Please share any personal experiences.

All NTSE scholars or those who attended the interview previously please do answer, since this scholarship means a lot to me!

Thank you for your help
PS: I have opted for MPC (Maths-Phy-Chem) stream for Class 11 and 12