Know how Primary Keys (no NULLs, unique) and Foreign Keys (links tables) maintain referential integrity.
Mastering SQL Server interviews requires a blend of core theoretical knowledge and deep technical experience. Candidates should be prepared to discuss everything from basic query syntax to high-level architecture and disaster recovery strategies. Core Technical Concepts 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
Senior-level roles focus heavily on your ability to fix "slowness" at scale. SQL Server Interview Questions & Answers – Wait Types Know how Primary Keys (no NULLs
Be ready to define its purpose—reducing data redundancy—and explain the different normal forms (1NF, 2NF, 3NF).