Interview Q&A

Short answer: public interface IPlugin { void Execute(); } Load dynamically var assembly = Assembly.LoadFrom("Plugin.dll"); var type = assembly.GetTypes().First(t => typeof(IPlugin).IsAssignableFrom(t)); var plugin = (IPlugin)Activator.CreateInstance(type); plugin.Execute();

Example code

public interface IPlugin
{ void Execute(); } Load dynamically var assembly = Assembly.LoadFrom("Plugin.dll");
var type = assembly.GetTypes().First(t => typeof(IPlugin).IsAssignableFrom(t));
var plugin = (IPlugin)Activator.CreateInstance(type); plugin.Execute();

Real-world example (ShopNest)

Answer with: definition → one ShopNest-style story → trade-off → how you would verify it in production.

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.