Junior From PDF EF Core Entity Framework Core

What is eager loading?

Q: What is eager loading?

Short answer: How is .Include() / .ThenInclude() used? Eager loading loads related data as part of the initial query, reducing round-trips to the database. ✅ Use .Include() to load related entities: var blogs = context.Blogs .Include(b => b.Posts) .ToList(); Use .ThenInclude() for deeper nesting: context.Blogs .Include(b => b.Posts) .ThenInclude(p => p.Comments); Eager loading prevents lazy load performance issues and the N+1… Real-world example (ShopNest) Loading orders with items uses .Include(o => o.Items) . Without Include, listing 50 orders can trigger 50 extra queries (N+1). Say this in the interview Define — one clear sentence (the short answer above). Example — relate it to a project like ShopNest or your real work. Trade-off — when you would not use it.

Short answer: How is .Include() / .ThenInclude() used? Eager loading loads related data as part of the initial query, reducing round-trips to the database. ✅ Use .Include() to load related entities: var blogs = context.Blogs .Include(b => b.Posts) .ToList(); Use .ThenInclude() for deeper nesting: context.Blogs .Include(b => b.Posts) .ThenInclude(p => p.Comments); Eager loading prevents lazy load performance issues and the N+1…

Real-world example (ShopNest)

Loading orders with items uses .Include(o => o.Items). Without Include, listing 50 orders can trigger 50 extra queries (N+1).

Say this in the interview

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

Previous Next