Client Code (Main Program):?

Short answer: The client code uses the factory to create a logger without needing to know which type of logger is being instantiated. Based on the factory used (FileLoggerFactory or ConsoleLoggerFactory), the corresponding logger is created. class Program { static void Main() {

Example code

LoggerFactory factory = new ConsoleLoggerFactory();
ILogger logger = factory.CreateLogger(); logger.Log("This is a log message."); }
}

Real-world example (ShopNest)

Use a GoF pattern in ShopNest only when it removes duplication or makes a change safer—explain the problem it solves in the interview.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.