One of the questions they asked was: “Walk me through a technical challenge you faced in a project and how you solved it.” I described a performance issue I encountered while building a web application, where inefficient database queries slowed response time. I walked through how I identified the bottleneck using logs and query profiling, optimized the queries using indexing, and validated improvements through testing. They wanted to evaluate structured problem-solving, clarity of thought, and ability to translate technical work into business value.