EPAM Systems Data Scientist Interview Questions
The questions to prepare for a EPAM Systems Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Explain regression evaluation metrics and verify the assumptions required for reliable inference.
EPAM SystemsCompare CNN and Transformer architectures for vision, and explain when each is the better model choice.
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Use a two-proportion z-test and a 95% confidence interval to decide how to communicate a checkout A/B test result to product and executive audiences.
EPAM SystemsDesign a low latency RAG system over millions of documents, with scalable retrieval, ranking, generation, and production monitoring.
EPAM SystemsCompare batch and streaming data processing, including when each fits best in a pipeline.
EPAM SystemsCalculate each user's 7-day activity average and rank users within their cohort using PostgreSQL window functions.
EPAM SystemsRank the top three Digitas México campaigns each month using aggregation and ROW_NUMBER.
Digitas MéxicoEPAM SystemsCalculate chronological running transaction totals for each account while excluding non-posted transactions.
EPAM SystemsExplain how transformer self-attention works, including its role in sequence modeling and why it scales better than RNNs.
EPAM SystemsInvestigate why a key KPI moved the wrong way after a product change and separate signal from noise.
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