The only correct answer is... both answers (1 and -11).
That is, if you're really interested in pursuing the position.
Not only are you willing to take their tests, but you go beyond what is required, for your own benefit and edification.
That's why, when presented with the URL during the interview, you immediately load it, and right-click View Source into another tab, while simultaneously making small talk with the former CTO interviewer.
Even though you're a backender, you know enough frontend to navigate the interspersed style and html and javascript and so, you solve both puzzles, and weave into the conversation the two answers, while also deciding that this is probably not the gig for you, but who knows, let's see how they answer your questions now...
That is, if you're really interested in pursuing the position.
Not only are you willing to take their tests, but you go beyond what is required, for your own benefit and edification.
That's why, when presented with the URL during the interview, you immediately load it, and right-click View Source into another tab, while simultaneously making small talk with the former CTO interviewer.
Even though you're a backender, you know enough frontend to navigate the interspersed style and html and javascript and so, you solve both puzzles, and weave into the conversation the two answers, while also deciding that this is probably not the gig for you, but who knows, let's see how they answer your questions now...