Answered by Stephanie, Hiring Expert at AT&T Inc., on Monday, March 19, 2018
That is a tough question and a tougher situation. We have all had a boss that left us with a bad impression, but that experience doesn't need to carry over into our next job.
I have found in my career that I never know who knows one another. With the power of networking being such a strong force, don't run the risk of bad mouthing someone (however true it might be) who might be the buddy of your interviewer.
Ok, so what do I say? Perhaps...My previous job gave me a lot of exposure to a variety of people and work styles. It was a great opportunity to see what I want and don't want in my future work life.
Practice what you might want to say on someone who will give you good feedback. Get comfortable with your response and it will help you prep for the question in the real interview.
Best of luck!