Pretty easy for someone who's been in customer service awhile and who's had some light retail management experience. I was a shift lead at Walgreens when I interviewed at Fetch for this role, and I'd had some self-taught web development education for about 2 years prior to it as well. The interview overall was normal questions like "tell me about what your customer service experience" or "how would you handle a difficult customer in X situation". They threw in a "tell me how to make a peanut butter & jelly sandwich" one to check how I handle procedural explanations, which is something you have to do when educating users in Zendesk.