Sql - Server Interview Questions

Understand the physical difference between Clustered Indexes (stores actual data in sorted order) and Non-Clustered Indexes (stores pointers to the data).

Know how Primary Keys (no NULLs, unique) and Foreign Keys (links tables) maintain referential integrity. SQL Server Interview Questions

Senior-level roles focus heavily on your ability to fix "slowness" at scale. SQL Server Interview Questions & Answers – Wait Types SQL Server Interview Questions