Justworks Data Analyst Interview Questions
The questions to prepare for a Justworks Data Analyst interview. Questions from real interview reports rank first. Updated weekly.
Explain how INNER JOIN and LEFT JOIN differ, and when to use each for matched-only versus all-left-row analysis.
JustworksTests your ability to write SQL with time windows, aggregation, and filtering logic.
JustworksTests your SQL window function skills for partitioning, ordering, and selecting latest records.
JustworksRank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.
WaymoCompute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.
Gain Digital
TCS
Zest AIUse joins and LAG to isolate departments driving a large month-over-month spending variance.
State of California
University of Chicago
The Church of Jesus Christ of Latter-day SaintsInvestigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.
JustworksTests your metrics thinking and ability to define success criteria for a product change.
JustworksTests your ability to define leading indicators and churn risk measurement using data.
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Tests conflict resolution and influence without authority when a stakeholder or financial advisor disagrees with your recommendation.
JustworksTests your product sense and ability to translate raw usage data into actionable product questions.
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