My thanks to everyone for sharing their respective experience.
My experience:
OFC:
Documents required - Original Passport, DS160, Appointment confirmation
Interview:
Documents carried by me -
1) Original Passport, DS160, Appointment confirmation
2) Original I-797
3) Other H1B documents provided by the company
4) Other original documents (Education, Experience Letters, 3 months salary slips, Income Tax returns, Marriage certificate)
@Interview
Provided the original passport and then the I-797 originals to the visa officer.
Questions asked:
How many years have you been working for the company?
How did you get to know about the company (which is sponsoring the H1B)?
How was the interview conducted?
Would you be working at the company office or the client place?
When was the job offered to you?
Is there any job offer letter provided by the company?
Would your wife accompany you or join later?
Have you read the white pamphlet (given to us when entering the consulate premises)?
Visa is approved and the passport will be delivered in 3-5 days.
The passport was ready for pick-up the same evening. I did not receive any SMS about the passport being ready for pick-up but got the information on their website at
http://www.ustraveldocs.com/in/in-niv-passporttrack.asp.