People Tech Group Data Scientist Interview Questions
The questions to prepare for a People Tech Group Data Scientist interview. Questions from real interview reports rank first. Updated weekly.
Explain how transformer self-attention works, including its role in sequence modeling and why it scales better than RNNs.
People Tech GroupExplain how to test whether an observed experiment lift is real using hypothesis testing, p-values, and confidence intervals.
People Tech GroupCompare Random Forest and Gradient Boosting, then choose the right ensemble for a supervised learning task.
People Tech GroupExplain how to reduce memory usage and stabilize a Pandas-based batch pipeline that is failing on larger inputs.
People Tech GroupDiagnose a post-release KPI drop by separating instrumentation issues from real behavior changes and tracing the problem through the metric hierarchy.
People Tech GroupChoose the right evaluation metric for an imbalanced dataset and explain why accuracy can mislead.
People Tech GroupFramework for choosing a feature's primary success metric and guardrails before launch.
People Tech GroupEvaluates your ability to translate retention questions into correct SQL logic.
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Find the second highest salary in each department without using aggregate functions.
Credit Genie
Devoteam
Cisco Restaurant + BarAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
Total Wine & More
Inc.
Benjamin MooreUse LAG and window functions to identify the slowest stage in the fulfillment chain.
Instacart