Basically, a script of questions was followed without paying attention to the answers. Whenever I provided a technical response and gave a practical example of its application, a second obvious question was asked, even though the initial answer I had given already addressed the second question implicitly. That's why the interview ended up lasting much longer than necessary. They were mainly conceptual questions. He asked if I knew what Redis was, relational databases... He was more concerned with the definitions rather than whether the candidate knew how to actually use the tools. In fact, the feedback I received was, "Whenever I asked about something specific, he mostly tried to explain how he was using it. But when I tried to delve into the concept, I don't think he clearly understood things despite using them." In other words, they are looking for someone who is a dictionary of terms rather than someone who actually knows how to use each technology effectively.