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ML Knowledge
4 years ago
Could you elaborate on the differences between L1 and L2 regularization techniques for regression analysis, and when using one over the other is justified?
Data Scientist

Duolingo

Grammarly

Transferwise

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4 years ago
ML Knowledge
4 years ago
Could you detail the operational process of a 1D CNN?
Data Scientist

Duolingo

Figma

UberEats

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4 years ago
ML Knowledge
4 years ago
Could you give an overview of what Random Forest is and how it works?
Data Scientist

Duolingo

Digit Logo

Digit

Figma

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4 years ago
Behavioral
4 years ago
What's the usual workflow for a Data Science project, from its kickoff to its wrap-up?
Data Scientist

Duolingo

Cisco Logo

Cisco

Arm Logo

Arm

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4 years ago
ML Knowledge
4 years ago
How do you understand the term 'log loss' in evaluating classifiers?
Data ScientistMachine Learning Engineer

Duolingo

Datadog Logo

Datadog

DocuSign Logo

DocuSign

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4 years ago
Big Data
4 years ago
Please provide a concise explanation of MapReduce and its operational process.,
Data Scientist

Duolingo

Affirm Logo

Affirm

SurveyMonkey Logo

SurveyMonkey

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4 years ago
Behavioral
4 years ago
Can you describe why you would be a good fit for Duolingo?
Data Scientist

Duolingo

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4 years ago
Product CaseML System DesignML Case
4 years ago
Tell me an approach to design a system (from a Data Science perspective) to alert a user that some value you monitor on one of his server is abnormal / deserve action (anomaly detection on time series) ?
Data Scientist

Duolingo

Stack Overflow Logo

Stack Overflow

Qualcomm Logo

Qualcomm

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4 years ago
Statistics
4 years ago
Please describe the steps you would take to generate an ROC curve using predicted probabilities and true labels.
Data Scientist

Duolingo

IBM Logo

IBM

OfferUp Logo

OfferUp

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4 years ago
Behavioral
4 years ago
Tell me about a performance rating that you disagreed with.
Data ScientistFull Stack Software EngineerData AnalystData Engineering Manager

Duolingo

Magic Leap Logo

Magic Leap

Proofpoint Logo

Proofpoint

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4 years ago

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*All interview questions are submitted by recent Duolingo Data Scientist candidates, labelled and categorized by Prepfully, and then published after being verified by Data Scientists at Duolingo.

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