DeltaX Data Analyst Interview Questions
The questions to prepare for a DeltaX Data Analyst interview. Questions from real interview reports rank first. Updated weekly.
Explain how to identify, assess, and handle NULL values before analysis using basic SQL profiling and replacement logic.
Tests your SQL tuning skills, query plan reasoning, and performance optimization techniques.
Assesses SQL fundamentals and your ability to choose the right aggregation for the question.
Evaluates your ability to model and query hierarchical or related records in SQL.
Assesses your data preparation workflow and judgment before running analysis.
Evaluates your ability to implement correct level-order traversal logic and reasoning.
Calculate batch-level rolling 30-day screening averages using joins, daily aggregation, and window frames.
Recursion PharmaceuticalsFind the top 3 users by completed transaction volume in the last 30 days using joins and aggregation.
Revolut
ChimeAnalyze weekly service delivery performance by team using joins, a CTE, date aggregation, and KPI calculations.
Deloitte
ReputationTests prioritization under pressure in a data engineering context, including stakeholder management, trade-off decisions, and ownership of outcomes.
Define the right metrics to judge whether a new product feature is successful.
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