once i interviewed at a company because my current employer was under aggressive take over from Microsoft. in the interview i fluked a question about js scope

once i interviewed at a company because my current employer was under aggressive take over from Microsoft. in the interview i fluked a question about js scope because the whiteboard handwrite of the interviewer made it hard to see which variable was i and which was j... but after he explained why i got wrong and i realized the letter mistake i was too stressed and dumbfounded to make a case, so i just left. 6 mo later, my current employer is still independent while that company is now owned by Microsoft...