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ML Knowledge

10 months ago

How do bagging and boosting techniques differ from each other in machine learning, and in what ways do they impact the bias and variance of models?

Data Scientist

Roku

Peloton

Niantic

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10 months ago

Behavioral

10 months ago

How did you overcome a challenge you've faced in a previous role where you had a lot of responsibility?

Data ScientistBackend EngineerProduct ManagerSoftware Engineer

Roku

MyGlamm

HubSpot

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10 months ago

Behavioral

10 months ago

How do you envision yourself in the next 5 years?

Data ScientistEngineering ManagerUX DesignerUX Researcher

Roku

DoorDash

Instana

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10 months ago

Statistics

10 months ago

How do you define panel data and cross sectional data, and what makes them unique from each other?

Data Scientist

Roku

Lyft

Klarna

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10 months ago

Behavioral

10 months ago

Which aspects of the Data Scientist role at Roku appeals to you most?

Data Scientist

Roku

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10 months ago

SQL

a year ago

Can you walk me through how you would filter data by time period in a set of (date, duration) tuples and compute some summary statistics such as the average duration and rolling sum?

Data Scientist

Roku

Samsara

GitLab

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a year ago

Statistics

a year ago

What's the chance of accurately guessing a card I draw from a deck? If I let you ask whether it's red or a face card to boost your odds, which query would you select?

Data Scientist

Roku

McAfee

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a year ago

Coding

a year ago

Can you construct a text-wrapping function that breaks a long string into space-separated lines under a character cap?

Data Scientist

Roku

Intuit

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a year ago

Behavioral

a year ago

How did you make the decision to change jobs? What makes you feel that Roku is a good next step?

Data Scientist

Roku

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a year ago

Behavioral

a year ago

I'd like to hear about a time when you failed to achieve something that you were trying to do.

Data ScientistProduct ManagerBackend EngineerSoftware Engineer

Roku

Okta

Stitch Fix

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a year ago

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

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