Here’s what I’ve always done when interviewing designers, but it’s not the answer you were asking about.
By the time designers reached the finalist stage and were interviewed, I had already seen their portfolios, their resumes, checked their references, Googled them, checked their social media accounts, and looked up whatever else I thought was important. Their portfolios told me most things I needed to know about their abilities, education, expertise, experience, and whether they could do the job.
If there was missing information, I’d ask them about it in the interview. Otherwise, I would try to get to know the person. I would often ask what book they’re reading. What movies do they like? What they do in their spare time. I would see if they had a sense of humor. Observe how they would attempt to tailor their answers to what they thought I wanted them to say. I might ask them to name a few things outside of design that genuinely fascinated them, or what historical figure they would like to have lunch with.
Rather than asking the predictable, easy-to-answer questions, I would try to fill in the blanks for each applicant and probe their analytical abilities, problem-solving skills, range of interests, and general curiosity. I would evaluate body language and emotional reactions, and look for personality traits that might make me regret hiring them.
Before the interview began, I would have already known what they could do. By the end of the interview, my goal was to better understand what motivated and interested them and how they might fit in. I liked to hire smart, self-starters, who were honest, didn’t have big egos, didn’t need to be tightly supervised, and who got genuine joy from solving difficult problems and discovering new things. I also expected a sense of humor, and would eliminate anyone whose demeanor gave me reason to doubt what they were telling me (or not telling me).
In addition, I would expect them to ask me questions because, after all, they were also interviewing me.