Started a new job 4 days ago and already had a super bad, cringe social interaction at work that I can genuinely not get over…

I just started a new job (less than 5 days ago) and was asked by someone in a super high position (exec) what my role meant. I found this to be a strange questions and interpreted the question as “what do I do?” / “what am I currently doing?”, which, since it had barely been 5 days, was nothing! I was purely getting onboarded. I froze and said, “I will find out in a week but I’m supporting x and x with x and x.” I made myself look so dumb and have never felt so embarrassed. Not to mention this was in front of an entire cohort of people also being onboarded. 

How can I get over this? Please help :(