I think everyone should have this in mind. I also had FE interviews, where the only FE concept I had were ordered lists. In bigger companies, you will usually be tested on your understanding as a whole - DS, Recursion, other Algorithms and Fundamentals of FE (of course it will depend). In lesser ones, you'll probably encounter more coding knowledge testing.
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
^ This
I think everyone should have this in mind. I also had FE interviews, where the only FE concept I had were ordered lists. In bigger companies, you will usually be tested on your understanding as a whole - DS, Recursion, other Algorithms and Fundamentals of FE (of course it will depend). In lesser ones, you'll probably encounter more coding knowledge testing.