Inner Join: Get employee names with their department location?

Short answer: join matches based on keys. join matches based on keys. join matches based on keys. join matches based on keys. join matches based on keys. join matches based on keys. join matches based on keys. join matches based on keys.

Example code

join matches based on keys. join matches based on keys. join matches based on keys. join matches based on keys. join matches based on keys. join matches based on keys. join matches based on keys. join matches based on keys.

Real-world example (ShopNest)

A sales report joins orders and customers, then GroupBy(c => c.City) to show revenue per city.

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.