DEPT Interview Questions
The questions to prepare for DEPT interviews, across all roles. Questions from real interview reports rank first. Updated weekly.
Use GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.
DEPTAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
Total Wine & More
Inc.
Benjamin MooreCalculate daily session-level funnel conversion rates using CTEs, CASE WHEN, and date functions.
Explain how you used a KPI and supporting metrics to diagnose a product issue and make a concrete product decision.
DEPTExplain how you align stakeholders with competing priorities, make trade-offs explicit, and keep execution on track.
DEPTTests your ability to deliver a clear, relevant introduction tailored to the role at Aqr.
DEPTExplain a practical approach to user research in the design process, from understanding user needs to turning findings into design decisions.
DEPTExplain how to design and evaluate an A/B test for a product feature, including metrics, MDE, sample size, and guardrails.
DEPTApproach for maintaining data quality and integrity across ETL pipelines.
DEPTExplain the four core OOP principles—encapsulation, abstraction, inheritance, and polymorphism—and why they matter in software design.
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