BOLD Interview Questions
The questions to prepare for BOLD 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.
Identify the five most active users in each category using aggregation and row numbering.
AAreteCalculate each region's rolling 30-day average of defaulted loans using PostgreSQL window functions.
United Auto CreditIdentify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
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Outline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.
Design a URL shortening service that routes, ranks, and monitors links at scale.
Explain how you would re-prioritize, manage scope, and align stakeholders when the team is overloaded and every request is treated as urgent.
Explain what a p-value means, how it relates to statistical significance, and how to describe it clearly to non-technical stakeholders.
Share how you used data to shape a business decision, including the analysis, recommendation, and outcome.
Tests ML model selection rationale and understanding of ensemble methods.