Ideally, you won’t interview with an organization that condones any black hat SEO practices, but it might be a trick question to make sure you wouldn’t use them either. Cloaking, keyword stuffing, copying content from another site, exchanging or trading links, buying links, hiding text, and using a link farm are all underhanded techniques frowned upon—and penalized—by Google.
What are some black hat SEO practices to avoid?