I don't expect you to know the answer. I expect you to tell me how you would research it.
An answer I like: "I'd search on amazon and a few other top fashion sites to get per-vendor count, as well as some of the lower end."
At that point I'd tell them that ShopBop and Net-a-porter are two typical bigger sites, and they each have about 20-50k items. I'd also point out there is a longer tail of much smaller sites.
If your answer is 3M or 20M to my 10M, I don't much care. This isn't a question with a definite answer, it's a question about whether you can think on your feet and get started on poorly defined problems.
With me, it's a good sign if I'm asking you the poorly defined questions with unclear answers. If I reach this point, I've already decided you probably know how to code, and I want to determine if you can figure out what to code.
> If I reach this point, I've already decided you probably know how to code, and I want to determine if you can figure out what to code.
Well, if that's the case, then it could be a good question.
However, you didn't state or emphasize that in your blog post and from what I've heard, many companies ask such unrelated questions first to filter out completely hopeless candidates and then get to the real interview (technical questions), so I assumes this is what you meant, and I don't owe you an apology ;-)
An answer I like: "I'd search on amazon and a few other top fashion sites to get per-vendor count, as well as some of the lower end."
At that point I'd tell them that ShopBop and Net-a-porter are two typical bigger sites, and they each have about 20-50k items. I'd also point out there is a longer tail of much smaller sites.
If your answer is 3M or 20M to my 10M, I don't much care. This isn't a question with a definite answer, it's a question about whether you can think on your feet and get started on poorly defined problems.
With me, it's a good sign if I'm asking you the poorly defined questions with unclear answers. If I reach this point, I've already decided you probably know how to code, and I want to determine if you can figure out what to code.