CapTech Data Engineer Interview Questions
The questions to prepare for a CapTech Data Engineer interview. Questions from real interview reports rank first. Updated daily.
Explain how to diagnose and optimize a slow SQL query using execution plans, indexing, and simpler query patterns.
Evaluates ability to combine datasets correctly using SQL joins or Python merge operations.
Assesses foundational SQL knowledge for combining rows while preserving unmatched records.
Update negative numbers to zero and return the rows changed, while leaving zero, positive, and NULL values unchanged.
Aggregate settled payment activity by merchant and month while demonstrating a reporting-ready fact and dimension model.
Zoom Video CommunicationsWrite and explain a query that summarizes analyst query performance by dataset and ranks analysts by success rate.
Autodesk
PCS Global Tech
Gro IntelligenceApproach for keeping records aligned and trustworthy when multiple source systems feed the same pipeline.
Compare star and snowflake schemas in a warehouse pipeline, including structure and transformation trade-offs.
Compare ETL and ELT, and explain when ELT is the better pipeline pattern.
Evaluates ELT design choices, tooling, and data preparation practices for reliable pipelines.
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Tests career motivation, self-awareness, and whether the candidate has a concrete, experience-based reason for choosing consulting.