Sql Server Interview Questions Apr 2026

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

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

Be ready to define its purpose—reducing data redundancy—and explain the different normal forms (1NF, 2NF, 3NF). Know how Primary Keys (no NULLs, unique) and

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