Konfío Data Scientist Interview Questions
The questions to prepare for a Konfío Data Scientist interview. Questions from real interview reports rank first. Updated weekly.
Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.
KonfíoExplain practical strategies for handling missing values in a supervised learning workflow, from diagnosis to modeling and validation.
KonfíoExplain how to test whether an observed experiment lift is real using hypothesis testing, p-values, and confidence intervals.
KonfíoDesign an experiment that accounts for novelty effects and network spillovers before deciding whether to ship.
KonfíoExplain which classification metrics to use and how metric choice depends on the business objective and error tradeoffs.
KonfíoDiagnose a post-release KPI drop by separating instrumentation issues from real behavior changes and tracing the problem through the metric hierarchy.
KonfíoTests SQL window function proficiency for time-based customer metrics and correctness.
KonfíoDefine primary and guardrail metrics for a discovery UI test, with power, MDE, and a pre-registered analysis plan.
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Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.
Meta
Spotify
Meta ITCalculate each customer's cumulative transaction amount over time using a CTE and window function.
Banco Santander
Anz
Bank Of Tokyo-Mitsubishi UFJCalculate a rolling 7-day average of system error counts using window functions and date-based aggregation.
Datadog
Toyota
Agile Defense