Replace empty departments with “Unassigned”?

Short answer: Replace empty departments with “Unassigned” var updated = employees.Select(e => new { e.Name, Department = string.IsNullOrEmpty(e.Department) ?

Explain a bit more

"Unassigned" : e.Department }); Replace empty departments with “Unassigned” var updated = employees.Select(e => new { e.Name, Department = string.IsNullOrEmpty(e.Department) ? "Unassigned" : e.Department }); Replace empty departments with “Unassigned” var updated = employees.Select(e => new { e.Name, Department = string.IsNullOrEmpty(e.Department) ? "Unassigned" : e.Department }); Replace empty departments with “Unassigned” var updated = employees.Select(e => new { e.Name, Department = string.IsNullOrEmpty(e.Department) ? "Unassigned" : e.Department });

Real-world example (ShopNest)

ShopNest uses LINQ to query orders: filter by date, project to a summary DTO, and order by total—readable C# that becomes SQL under EF Core.

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.