Inner Join: Get employee names with their department location join d in departments on e.Department equals d.Name select new { e.Name, Department = e.Department, d.Location };

Short answer: var joined = from e in employees join matches based on keys.

Explain a bit more

var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys.

Example code

var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys. var joined = from e in employees join matches based on keys.

Real-world example (ShopNest)

ShopNest maps entities to DTOs with .Select(o => new OrderSummaryDto { Id = o.Id, Total = o.Total }) so the API does not leak internal fields.

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.