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📄 40 ArticlesSQL Fundamentals Guide: 20 Interview Questions
Master SQL fundamentals with 20 real interview questions from Amazon, Google, Meta. Learn SELECT optimization, WHERE filtering, NULL handling, execution order +...
Database Constraints – PRIMARY KEY, FOREIGN KEY, UNIQUE, CHECK: 20 Real Interview Questions
Database constraints fundamentals are rules that protect data quality and prevent mistakes. Think of constraints like guardrails on a highway—they […]
NoSQL Databases vs Relational Databases – Trade-offs and Use Cases: 20 Real Interview Questions
NoSQL vs Relational databases fundamentals represent two philosophies of data storage. Relational databases (SQL, tables, ACID) are like libraries: organized, […]
Database Replication, Backup Strategies, and Disaster Recovery: 20 Real Interview Questions
Database replication and backup fundamentals are about protecting data from loss and ensuring continuous availability. Replication copies data to multiple […]
Indexing Strategies (B-Tree, Hash, Full-Text) and Query Optimization: 20 Real Interview Questions
Database indexing fundamentals are like phone books for databases. Without an index, finding a customer by email means scanning every […]
dbt Project Structure, Configuration, Dependencies, and Package Management: 20 Real Interview Questions
dbt (data build tool) fundamentals are transforming how data teams build, test, and deploy analytics code. dbt abstracts away the […]
dbt Models – Tables, Views, Incremental Models, Ephemeral Models, Snapshot Models: 20 Interview Questions
dbt models are the core transformation unit in data build tool. Understanding different materialization strategies is crucial for building efficient, […]
dbt Macros, Jinja2 Templating, Custom Functions, Code Reusability: 20 Interview Questions
dbt macros are Jinja2 templating functions that enable code reusability, dynamic SQL generation, and abstractions for complex transformations. Mastering macros […]
dbt Tests, Documentation, Freshness Checks, Data Quality Validation: 20 Interview Questions
dbt testing and documentation transform data pipelines from fragile scripts into trustworthy, auditable systems. Understanding dbt’s data validation framework is […]
dbt Scheduling, Execution, CI/CD Integration, Orchestration: 20 Interview Questions
dbt production deployment requires orchestration frameworks to schedule runs, manage dependencies, and ensure reliability. Understanding dbt in enterprise CI/CD pipelines […]