Calfus Interview Questions
The questions to prepare for Calfus interviews, across all roles. Questions from real interview reports rank first. Updated weekly.
Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.
CalfusCompare star and snowflake schemas for warehouse design, including trade-offs in normalization, query simplicity, and analytics performance.
CalfusAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
Total Wine & More
Inc.
Benjamin MooreCompute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.
Gain Digital
TCS
Zest AIApproach for maintaining data quality and integrity across ETL pipelines.
CalfusEvaluate when a pipeline should use stream processing versus scheduled batch based on latency, cost, complexity, and data quality needs.
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Assesses model selection reasoning based on data characteristics and problem requirements.
CalfusEvaluates practical knowledge of ML fundamentals and model improvement techniques.
CalfusTests structured thinking and readiness to transition from logic puzzles to coding.
CalfusAssesses time management, prioritization, and problem-solving under constraints.
Calfus