(During the interview, you often encounter some questions you are not prepared for. If you don't study and accumulate at ordinary times, you basically don't know what to do at this time. If you have continuous thinking and accumulation, you can turn the question into: if you were asked to design this function, how would you design it? When you accumulate enough, you can easily have your own set of designs. Because the bottom design ideas of most excellent tool frameworks are the same, everyone likes to use excellent things. As long as we think in that direction, we are likely to give similar solutions.)