Filter employees with salary in specific set?

Short answer: var filterSalaries = new[] { 60000, 80000 }; var match = employees.Where(e => filterSalaries.Contains(e.Salary));

Example code

var filterSalaries = new[] { 60000, 80000 };
var match = employees.Where(e => filterSalaries.Contains(e.Salary));

Real-world example (ShopNest)

ShopNest filters active products with products.Where(p => p.IsActive && p.Stock > 0) before showing the catalog.

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.