Need Suggestions for H1 1st stamping (F1 to H1) in india

[Krishna.jira7]

Self Background: Came to US on F1 Visa 2015 and after graduation and OPT/STEM valid upto june/2019 but converted to H1B visa valid through 2021. Now I'm working on H1B visa from oct/2018 for same employer (consulting MNC like TCS, WIPRO but not Indian MNC).
I need H1 Stamping if I crossed country. So Seeking help from the experienced people.
Please post Any questions related to interview which you come across/ HYD or chennai preferable locations etc...any information would be helpful.

Thanks in advance