SDG Group Interview Questions
The questions to prepare for SDG Group interviews, across all roles. Questions from real interview reports rank first. Updated daily.
Return the second-highest distinct non-null salary from a single employee table.
Calculate three-day rolling user activity averages and classify behavior trends with SQL window functions.
Approach for maintaining data quality and integrity across ETL pipelines.
A structured approach to debugging production data pipelines, with focus on orchestration, data quality, idempotency, and safe backfills.
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Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
Investigate why a key KPI moved the wrong way after a product change and separate signal from noise.
Define a success metric for a new feature that captures real user value, not just raw usage.
Explain what a p-value means, how it relates to statistical significance, and how to describe it clearly to non-technical stakeholders.