Desjardins Data Scientist Interview Questions
The questions to prepare for a Desjardins Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Identify multi-day streaks of anomalous email sending activity for a specific user using PostgreSQL window functions.
Explain how RANK() and DENSE_RANK() handle ties differently in ordered SQL results such as leaderboards.
Use a time-based window to identify users with more than three failed attempts within five minutes.
ByteDance
ChimeDefine a success metric for a new feature that captures real user value, not just raw usage.
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Design an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.
Explain why statistical significance matters, then distinguish reliable evidence from practical business impact.
Investigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.
Explain how to choose credit risk decision thresholds by balancing false positives, false negatives, costs, fairness, and regulatory requirements.
Assesses communication skills for conveying statistical ideas to non-technical audiences.