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SQL

3 years ago

What are the variations in use and outcome between a left join, a union, and a right join in SQL?

Data Scientist

Duolingo

Benchling

Illumina

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3 years ago

ML Knowledge

3 years ago

Could you discuss the criteria you use when choosing between Ridge and Lasso regression for a specific problem?

Data Scientist

Duolingo

Riot Games

Swiggy

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3 years ago

Behavioral

3 years ago

Why are you looking for a job at the moment?

Data ScientistData Science ManagerEngineering ManagerUX Designer

Duolingo

Samsung

Bolt

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3 years ago

ML Knowledge

3 years ago

Can you differentiate between the various sampling methods?

Data Scientist

Duolingo

Razorpay

Grafana Labs

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3 years ago

Behavioral

3 years ago

I want to ask you about a time when you failed in your job.

Data ScientistSoftware EngineerTechnical Program ManageriOS Engineer

Duolingo

Epic Systems

Juul Labs

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3 years ago

ML Knowledge

3 years ago

What steps do you take to deal with gradient problems in deep learning, and how do you evaluate their effectiveness?

Data Scientist

Duolingo

TripAdvisor

Spotify

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3 years ago

Behavioral

3 years ago

Would you change anything about Duolingo if you had the chance?

Data Scientist

Duolingo

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3 years ago

Behavioral

3 years ago

Please share with me a time you failed at work.

Data ScientistTechnical Program ManagerSoftware EngineerML Engineering Manager

Duolingo

Capital One

TuSimple

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3 years ago

Behavioral

3 years ago

Describe a time you disagreed with a coworker but had to cooperate to get a project done.

Data ScientistData Engineering ManagerEngineering ManagerUX Designer

Duolingo

Amazon

Figma

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3 years ago

Behavioral

3 years ago

Would you like to share a project you are proud of?

Data ScientistProduct ManagerBackend EngineerSoftware Engineer

Duolingo

Cisco

GoodData

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3 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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