How does Code First handle schema changes in the database?

Short answer: EF Core uses migrations to track and apply schema changes: You modify your C# models. Use Add-Migration to create a migration class. Use Update-Database to apply the changes to the DB. EF Core compares the model to the current schema to generate SQL.

Real-world example (ShopNest)

When ShopNest adds a DiscountCode column, you create a migration, review the SQL, then apply it on staging before 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.