Tata Consultancy Services (North America) Data Engineer Interview Questions
The questions to prepare for a Tata Consultancy Services (North America) Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Aggregate TCS BaNCS sales by month, then calculate a chronological running total with a window function.
Tata Consultancy Services (North America)Compare star and snowflake schemas for warehouse design, including trade-offs in normalization, query simplicity, and analytics performance.
Tata Consultancy Services (North America)Explain TRUNCATE vs DELETE vs DROP, focusing on logging, constraints, transactions, and safe usage in production.
Tata Consultancy Services (North America)Use a CTE, join, and dense ranking to return each client's second-highest distinct transaction amount.
The AmeripriseTata Consultancy Services (North America)
Wells FargoUse GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.
Housecall Pro
Equifax
XYZReverse a string and extract insertion-ordered unique values from a Python dictionary using slicing and a set.
Tata Consultancy Services (North America)Explain how map differs from flatMap by comparing output cardinality, nesting, and typical use cases.
Tata Consultancy Services (North America)Explain Spark's lazy evaluation: lineage DAGs, transformations vs actions, and how optimization and execution are triggered.
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Approach for building privacy controls, lineage, and auditability into data pipelines that handle personal data.
Tata Consultancy Services (North America)Approach for building data pipelines that scale in throughput, reliability, and operational visibility.
Tata Consultancy Services (North America)