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Concepts, Interview Prep & More
Data engineering fundamentals, interview questions, architecture patterns, and cross-cutting concepts.
7 in-depth tutorials
01Top 20 DE Interview Questions
Top 20 data engineering interview questions with detailed answers.
Medallion architecture: bronze, silver, gold layers with Delta Lake implementation.
03Top 15 ADF Interview Questions
Prepare for your Azure Data Factory interview with 15 real questions and detailed answers.
Parquet vs CSV vs JSON: storage size, query performance, and format selection guide.
Understand the difference between schema-on-write (databases) and schema-on-read (data lakes). Learn when to use each, how the Lakehouse architecture combines both, and how this relates to real ADF/Synapse pipelines.
06How Real Companies Receive Data
Real-world data ingestion patterns: SFTP, APIs, CDC, event streaming, and batch loading.
07Table Creation and Governance
The complete guide to how tables are actually created in enterprise data engineering — and why it is nothing like tutorials.