I think day-long interviews are fine, and I think real-world work samples are fine, but the combination is pushing it a bit as far as what is fair to ask job ap

I think day-long interviews are fine, and I think real-world work samples are fine, but the combination is pushing it a bit as far as what is fair to ask job applicants to do, unless you're going to have some sort of explicit and upfront agreement about a trial period.