I was recently really shocked because I am, as previously stated, with a lot of Americans who are in Malaysia for work. They honestly have zero idea about what we call the head scarf. I thought it was basic, basic knowledge. Some of them even ask me what the purpose of the hijab. They are very ignorant about it. Make duaa for me that I explain it in a way that helps them understand the hijab is good 
I don’t think it is so surprising if someone ask what is a hijab? Because not everywhere in the place is used to it!