Sql Server Interview Questions Apr 2026

Explain the difference between DELETE (removes rows, loggable), TRUNCATE (wipes table, non-loggable), and DROP (removes entire table structure). Performance Tuning & Optimization

Be ready to define its purpose—reducing data redundancy—and explain the different normal forms (1NF, 2NF, 3NF). 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

Know how Primary Keys (no NULLs, unique) and Foreign Keys (links tables) maintain referential integrity. Candidates should be prepared to discuss everything from

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

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

These questions often form the "screening" portion of an interview, testing your fundamental grasp of relational databases.