Top 50 Data Analyst Interview Questions
The 50 most important questions to prepare for Data Analyst interviews. Questions from real interview reports rank first. Updated weekly.
Approach for maintaining data quality and integrity across ETL pipelines.
Booking
Clarify Health Solutions
University of ArkansasApproach for handling missing data in an ML data pipeline, including validation, imputation, and safe downstream consumption.
Marks & Spencer
Ais
Belvedere TradingExplain how INNER JOIN and LEFT JOIN differ, and when to use each for matched-only versus all-left-row analysis.
BMC Software
The Home Depot
MetaExplain how to profile, clean, and standardize missing or dirty data before analysis.
Samsung Electronics
American Airlines
US Air ForceAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
Total Wine & More
HD Supply
Benjamin MooreCompare ERP and ledger month-end totals by month and flag mismatches using joins and conditional logic.
Memorial Hermann Health SystemSign up to see every question
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Explain how you used a KPI and supporting metrics to diagnose a product issue and make a concrete product decision.
Booking
Dyneti TechnologiesDDAZNExplain what a p-value means in hypothesis testing and how it relates to statistical significance.
Publicis Groupe
UC Santa Barbara
Enterprise PeakShare how you used data to shape a business decision, including the analysis, recommendation, and outcome.
Impact Recruitment Group
Celestar
RiskSpanDesign an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.
Neptune Technology GroupThe Home DepotSamsung Electronics