Thread-Safe Singleton (Eager Initialization):?

Short answer: The singleton instance is created when the class is loaded, guaranteeing thread safety without locking. However, it may have a slight performance overhead due to the instance being created regardless of whether it is needed. public class Singleton

Example code

{
private static readonly Singleton _instance = new Singleton();
private Singleton() { }
public static Singleton Instance => _instance;
}

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.