Stamping Questions

Hi,

I have been issued an H1 B visa from a different company in the past. However, I did not travel then due to my higher studies. The visa expired after a year since there was no lottery system back then.

Now I have received a fresh H1 B petition and am due for my interview in a few days. What would be a safe answer to give if the visa officer asks me why I have not traveled in the past?

Also are there chances of rejection based on my answer? Please let me know.

Thanks & regards,

Dipanwita.