H1-B Visa Stamping questions

[visastamp]

Hello,
I received my H-B approval from USA INS office
and my USA employer say they will be sending
me approval documents asap. I took appointment
at Delhi Embassy for Visa Stamping.

Can any one help me on how to prepare for interview,
in terms of what all documents should I carry, and
what kind of questions they might ask me.

Am a single girl working at Chennai for over 3yrs
with MCA and BSc(Computer Science) background.

Ofcourse I already informed my current employer at
Chennai that I will be visiting Embassy for Visa Stamping
Interview soon.

Appreciate all help.