This along with similar questions for UX Design interview is a regular feature in UX Design Interviews, be ready to tackle it. One scenario where I had to redesign a poorly performing feature was for an e-commerce website's product search functionality. The original design allowed users to search for products using only keywords, but the search results were often irrelevant and not useful to the user.  To identify the issues, I conducted usability testing and gathered feedback from users. I also analyzed search query data to see what terms users were searching for and how successful their searches were.  Based on this information, I made several changes to the search feature. I added faceted search options to allow users to narrow down their results by product attributes such as brand, color, and price. I also implemented auto-suggestions and spelling corrections to improve the accuracy of the search results. These changes resulted in a significant increase in user satisfaction and sales.