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Behavioral
a year ago
Can you tell me about a time when you had multiple competing priorities? How did you handle it?
Data ScientistData Science ManagerML Engineering ManagerEngineering Manager

Duolingo

Medium

WeTransfer

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a year ago
Coding
a year ago
What steps would you take to program the search for the most extended incremental subarray using dynamic programming?
Data Scientist

Duolingo

StubHub

Chime

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a year ago
ML Knowledge
a year ago
What techniques do you apply to handle skewed data in model performance analysis, and what metrics are essential in these scenarios?
Data ScientistMachine Learning Engineer

Duolingo

SeatGeek Logo

SeatGeek

Chime

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a year ago
Coding
a year ago
Which item in this array is the 18th largest according to its numerical value?
Data Scientist

Duolingo

Cloudera Logo

Cloudera

Commvault Logo

Commvault

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a year ago
Behavioral
a year ago
Do you believe that Duolingo is a good fit for you? Why is this the case?
Data Scientist

Duolingo

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a year ago
Coding
a year ago
Could you devise a method to flip a string's characters?
Data ScientistMachine Learning Engineer

Duolingo

Skyscanner Logo

Skyscanner

StubHub

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a year ago
Coding
a year ago
Can you devise a binary tree given its preorder and inorder traversals?
Data Scientist

Duolingo

eBay Logo

eBay

Samsung Logo

Samsung

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a year ago
Behavioral
a year ago
Why are you looking for a new job?
Data ScientistEngineering ManagerUX DesignerUX Researcher

Duolingo

Sanmina Logo

Sanmina

Dollar Shave Club Logo

Dollar Shave Club

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a year ago
ML Knowledge
a year ago
Describe how the attention mechanism works in neural networks.
Data Scientist

Duolingo

Convoy Logo

Convoy

Bloomberg Logo

Bloomberg

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a year ago
ML Knowledge
a year ago
As an expert on linear regression, can you explain the fundamental assumptions of this modeling technique and why they are necessary for an accurate interpretation of results?
Data Scientist

Duolingo

Illumina Logo

Illumina

StubHub

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a year 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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