When answering this interview question, it's important to provide specific examples of how you've incorporated UX and UI design principles in your work. Here's an example answer:
"In my previous role as a UI/UX designer at ABC Company, I was responsible for designing a mobile app for our clients. To ensure the best user experience, I conducted user research and usability testing to understand how users interact with our product.
Based on the research findings, I redesigned the user interface by simplifying the navigation, reducing clutter, and using clear visual cues. I also incorporated responsive design principles to ensure the app looked and functioned well on different screen sizes.
Additionally, I incorporated accessibility features such as larger fonts, high contrast colors, and alt text for images to ensure that users with disabilities can use our app with ease.
As a result, we received positive feedback from our clients and saw an increase in user engagement and satisfaction."
Remember to highlight specific design principles that you used and the impact they had on the user experience. This will demonstrate your design skills and your ability to create solutions that meet user needs.