Interview Q&A

Short answer: double avgSalary = employees .Average(e => e.Salary); double avgSalary = employees .Average(e => e.Salary); double avgSalary = employees .Average(e => e.Salary); double avgSalary = employees .Average(e => e.Salary);

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.

Short answer: What is the average salary in IT? double avgSalary = employees .Where(e => e.Department == "IT") .Average(e => e.Salary); What is the average salary in IT? double avgSalary = employees .Where(e => e.Department == "IT") .Average(e => e.Salary); What is the average salary in IT? double avgSalary = employees .Where(e => e.Department == "IT") .Average(e =>… e.Salary); What is the average salary in IT? double avgSalary =…

Explain a bit more

employees .Where(e => e.Department == "IT") .Average(e => e.Salary);

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.