[it_does_follow]

I haven't done or even really touched front end work in a decade and I believe that this would have been an interesting interview.

Given his perfect answers I probably would have been able to come pretty close to passing.

If you know anything at all about the details of html, all of these can be easily understood by looking at what they're claiming to do. None of these are esoteric even if your front end knowledge predates wide spread use of mobile devices.

Take line 5 for example. I have never heard of Open Graph, but I know that og: is declaring a namespace for a pretty self describing tag. It's clear from this take with no other information that it is providing a site name for a specific service.

I don't think it's a big ask at all for a senior front-end dev, who is fresh in the field, to know what the first 10 lines of one of the most popular websites out there is doing.