G MASS Interview Questions
The questions to prepare for G MASS interviews, across all roles. Questions from real interview reports rank first. Updated daily.
Calculate a three-day moving average of active-client revenue using aggregation and SQL window functions.
Explain INNER, LEFT, RIGHT, FULL OUTER, CROSS, and SELF JOINs with examples and when to use each.
Rank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.
Waymo
CruiseSegment Instacart orders by region, retailer, and derived delivery outcome with aggregate operational metrics.
InstacartA framework for deciding which features should ship first when building a new product.
Define a success metric for a new feature that captures real user value, not just raw usage.
Explain how you align stakeholders with competing priorities, make trade-offs explicit, and keep execution on track.
Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
Choose a practical KPI set that covers efficiency, quality, service levels, and business outcomes.
Plan a phased rollout for a new operational initiative with clear stages, success criteria, and risk controls.
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