Many freelancers, like those who work on the Upwork platform, have testimonials and client feedback they can share with you.

☛ Things to listen or watch for: Highlighted qualities. Does the freelancer deliver quality work? Do they communicate effectively? Are any problems identified? Working relationships aren't always flawless, but you should feel comfortable that any issues were isolated or have otherwise been addressed.

☛ Follow-up question: "What are your top strengths and weaknesses?" or "What worked well and what did not work well in past projects?" This classic interview question gives freelancers an open-ended opportunity to be genuine while also positioning themselves as a great fit for your work. You could also ask for references.