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 LAG to identify PayPal transactions matching a prior record within five minutes.
PayPalUse a time-based window to identify users with more than three failed attempts within five minutes.
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.
Tests your understanding of hypothesis testing and how it informs decisions in experiments.
Investigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.
Assesses how you manage classification trade-offs for credit risk outcomes.
Assesses communication skills for conveying statistical ideas to non-technical audiences.