F2 visa for husband,didnt receive opt card

i I am on F1 since 2014 and pursuing my masters which is going to be finished by December 2015. I recently got married in august 2015 and now I have applied for my Husband F2 visa and will be interviewing soon. Do you think that being in my last semester will have an effect on the approval rate? Is it fine to mention that I will be graduating in May 2016 instead of Dec 2015? My i20 is approved till Dec 2016 and applied for OPT? I am waiting for OPT. Could you please suggest what would be good to answer to VO if he ask when is your wife graduating?

Can anyone pls suggest when is the best time to attend visa after getting job or before getting opt card?