Databases

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SQL Server Interview Questions & Answers: 200 Questions from Fundamentals to Architect Level

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Technical Architects Zone (TAZ) SQL Server Interview Preparation SQL Server Interview Questions & Answers 200 Questions from Fundamentals to Advanced DBA and Architect-Level Scenarios Introduction Preparing for a SQL Server interview is not only about remembering definitions, commands and feature names. As database professionals move into Senior DBA, Technical Lead and Database Architect roles, interviews increasingly focus on how production problems are investigated, how technical decisions are made and how critical database situations are handled. To make interview preparation more practical, Technical Architects Zone provides a structured collection of 200 SQL Server Interview Questions & Answers . The questions progress from core SQL Server fundamentals to advanced production scenarios covering troubleshooting...
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SQL Server Storage Architecture Explained: How SQL Server Stores Data Internally

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  Introduction Have you ever wondered what happens when you insert a row into a SQL Server table? Where does the data actually go? How does SQL Server find free space? How are indexes stored? Why do DBAs talk about Pages, Extents, GAM, SGAM, PFS, and IAM? Understanding SQL Server Storage Architecture is one of the most important skills for any DBA, Database Architect, or Performance Engineer because almost every performance issue eventually leads back to how data is stored internally. In this article, we will simplify SQL Server's internal storage mechanism using practical examples. Why Storage Architecture Matters Understanding storage internals helps you: ✅ Troubleshoot performance issues ✅ Understand index fragmentation ✅ Optimize large tables ✅ Reduce disk I/O ✅ Improve backup and restore strategies ✅ Analyze space usage ✅ Perform advanced DBA troubleshooting The Foundation: Data Pages SQL Server stores all data in Pages . A Page is the smallest unit of storage. Page Size -...
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SQL Server Performance Troubleshooting: Essential Scripts Every Database personnel or Architect Should Have

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TECHNICAL ARCHITECTS ZONE SQL Server Performance Troubleshooting A practical collection of SQL Server scripts and diagnostic techniques for investigating CPU, I/O, blocking, waits, memory, TempDB and query-performance issues. Performance issues are among the most common challenges handled by SQL Server DBAs. A typical incident starts with a broad statement such as “the application is slow,” but that statement does not identify whether the underlying problem is blocking, CPU pressure, storage latency, memory pressure, TempDB contention or an inefficient query. Effective troubleshooting begins by collecting evidence from SQL Server before making configuration or application changes. This article provides practical Dynamic Management View queries that can help identify where to begin. TAZ Practical Note Capture evidence ...
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