B2 visa interview ..please help

[hala108]

Hi, I hope you remember me from last time. I am an Indian born Australian citizen. I am a monk living in a Hare Krishna temple in Auckland, New Zealand right now. I want to visit USA for 6 months and I have an invitation letter for B1/B2, type R visa, from a temple in USA. I have applied for my visitors visa and I have interview this Monday.

Could you please advice me :

1) what kind of questions I should expect in the interview?
2) shell I wear my robs or just normal outfit when I go for interview?
3) What documents shell I take with me to interview?
4) Is there anything in particular I need to know before interview?

Thanks a lot in advances
Regards