How to implement repository for EF Core?

Short answer: Sample signature / interface? public interface IRepository<T> where T : class { Task<T> GetByIdAsync(int id); Task<IEnumerable<T>> GetAllAsync(); Task AddAsync(T entity); void Update(T entity); void Delete(T entity); Task SaveChangesAsync(); }

Real-world example (ShopNest)

ShopNest registers AppDbContext as scoped. One HTTP request = one context. Never inject it as a singleton.

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.