H1B, H4 Visa

I have attended the visa interview.They gave me 221G white slip with my passport back and my visa interview went as below at counter no:16
Me: Good afternoon sir,How r u doing today?
Vo: No reply.
VO: What is your designation with sponsoring employer?
ME: Answered
VO: What is your designation with current employer?
ME: Answered
VO: Where are u working currently?
ME: Answered
VO: Who is your client?
ME: Answered
VO: what?(VO din't get the client name)
ME: Answered
VO:How did u get this offer?
ME: Answered
VO: Since how long did u know him?
ME: Answered
VO: How many employees are working with your client?
ME:Answered
VO: Total how many employee are there at client location?
ME:Answered
VO: How many employee are there at sponsoring company?
ME: Answered
VO: Give me all the docs which u get from your employer?
ME: Gave
Vo: wait at the lobby, i will call u once processing is done
Me: ok
Ater 30 mins VO called me.He said that i need some more additional documents required to take a final decision.
Vo Gave me 221G white slip.

This is my new opportunity.
My questions are
1.Can i know the result?
2.If we get this kind of query,how much is the visa success rate?
3.what type of questions will they ask to employer?
4.While taking the interview, did interviewer give any questions?

please clarify my doubts.

Thanks,
Upednar