Esoteric Questions During Front-end Interview: Valid?

Next time you have a webdev interview and the interviewer asks you an obscure technical question, show them the following very simple HTML example:

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
    </head>
    <body>

    </body>
</html>

Ask One Question

Which warning(s) and/or error(s) (if any) will the W3C Validator display for this HTML sample?

Even a lot of very experienced front-end devs probably don't know the answer.

This just goes to show you that technical interviews which ask esoteric questions aren't valid.

No matter how experienced you are, I can always ask a question about a specific detail that you don't know.

Also, did you know the answer to this question?

HINT - The W3C Validator returns :
1 warning and 1 error. Do you know what they are?

Jasman Deep - Sep 7

Aman Kumar - Sep 7

Md Nazmus Sakib - Sep 7

Syed Sadat Ali - Sep 7