Prepare for data engineering, data science, and data architect interviews. Choose a specific technology or go for the comprehensive Data Architect track.
Get a taste of what's inside. Each category below includes 5 free sample questions. Upgrade to Pro for the full 50+ questions per category with detailed answers and explanations.
Data structures, OOP, decorators, generators, pandas, numpy, and coding challenges.
JOINs, window functions, optimization, indexing, normalization, and tricky SQL puzzles.
DAGs, operators, XCom, scheduling, best practices, and production scenarios.
Models, materializations, testing, Jinja, macros, and deployment strategies.
ML algorithms, statistics, A/B testing, feature engineering, and case studies.
Columnar storage, MergeTree, performance tuning, and distributed queries.
MPP architecture, distribution keys, COPY, Spectrum, and cost optimization.
Transformers, attention, fine-tuning, RAG, prompt engineering, and deployment.