COS from L2 to H1B

I am in USA since Sep 2014 on L2 visa which is valid until Oct 2016. I got my EAD in Jan 2015 and started working in Feb 2015. In April 2016 my employer filed H1b for me and it got approved too. Now next step is to get the passport stamped when i leave USA and come back. I am planning to visit my home country in Dec 2016 and i have got visa interview date in January 2017.

What are the questions they may ask when someone is in COS category from L2 to H1? What are the documents I need to carry at the time of visa interview?

Thanks in advance,

Yash

I don’t think there would be lot of additional questions due to COS. The most they may ask is about the spouse, L1 employer. Generally the would ask more about H1 employer and job and not COS.