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ML Knowledge
2 years ago
What separates k-means as a clustering method from k-nearest neighbors as a classification method?
Data Scientist

Roku

Mozilla

Palantir Technologies

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2 years ago
ML Knowledge
2 years ago
Could you elaborate on the significance of tf-idf in natural language processing?
Data Scientist

Roku

Faire

Ola

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2 years ago
Coding
2 years ago
Show me how you'd write a function to generate a bell curve with random data and graph it.,
Data Scientist

Roku

SoFi Logo

SoFi

Qualcomm Logo

Qualcomm

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2 years ago
ML Knowledge
2 years ago
How do you handle categorical features in your data that have a large number of distinct values?
Data Scientist

Roku

Infineon Logo

Infineon

Pinterest Logo

Pinterest

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2 years ago
Behavioral
2 years ago
Can you share an example of when you went the extra mile for a project?
Data ScientistData Engineering ManagerEngineering ManagerUX Designer

Roku

Roblox Logo

Roblox

PayPal Logo

PayPal

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2 years ago
Coding
2 years ago
How would you approach writing a method to count the elements of a sorted list with -1 as an out-of-range marker, without built-in methods?
Data Scientist

Roku

Springboard Logo

Springboard

Faire

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2 years ago
ML KnowledgeML Case
2 years ago
In what ways is R-square an incomplete metric for linear regression analysis? How do you justify a low R-square value in terms of linear regression model fit?
Data Scientist

Roku

Bloomberg Logo

Bloomberg

HubSpot Logo

HubSpot

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2 years ago
SQL
2 years ago
What's the SQL query for retrieving distinct conversation events from a database?
Data Scientist

Roku

Zenefits Logo

Zenefits

Mapbox Logo

Mapbox

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2 years ago
ML KnowledgeML Case
2 years ago
Can you detail your experience in the field of NLP and the creation of recommender systems?
Data Scientist

Roku

Rakuten Logo

Rakuten

Cisco Logo

Cisco

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2 years ago
Behavioral
2 years ago
How would you describe yourself and why do you think that you should be hired by Roku?
Data Scientist

Roku

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2 years 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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