Understand the physical difference between Clustered Indexes (stores actual data in sorted order) and Non-Clustered Indexes (stores pointers to the data).
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
Explain the difference between DELETE (removes rows, loggable), TRUNCATE (wipes table, non-loggable), and DROP (removes entire table structure). Performance Tuning & Optimization SQL Server Interview Questions & Answers – Wait
Know how Primary Keys (no NULLs, unique) and Foreign Keys (links tables) maintain referential integrity. TRUNCATE (wipes table
Senior-level roles focus heavily on your ability to fix "slowness" at scale. SQL Server Interview Questions & Answers – Wait Types
These questions often form the "screening" portion of an interview, testing your fundamental grasp of relational databases.