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SQL
a year ago
Can you break down the differences between an inner join, left join, and right join in detail?
Data Scientist

Roku

Meta

Zomato

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a year ago
Statistics
a year ago
Can you simulate 1000 normally distributed data points using mean x and variance y, provide summary statistics, and explain the statistical measures along with generating a density plot?
Data Scientist

Roku

WeWork

Bolt

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a year ago
Behavioral
a year ago
How would you handle it if a coworker always arrived late to a scheduled meeting?
Data ScientistProgram ManagerFrontend EngineerFull Stack Software Engineer

Roku

SailPoint Logo

SailPoint

Flexport Logo

Flexport

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a year ago
ML Case
a year ago
Could you devise a system for promptly and effectively pinpointing objects in a visual frame?
Data Scientist

Roku

Instacart Logo

Instacart

OfferUp Logo

OfferUp

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a year ago
ML Knowledge
a year ago
Can you discuss the use of confusion matrix and ROC curve in evaluating a model's performance? How do they differ and when would you use one over the other?
Data ScientistMachine Learning Engineer

Roku

Udacity Logo

Udacity

Splunk Logo

Splunk

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a year ago
Statistics
a year ago
Describe what p-value is and its importance in statistical research.
Data Scientist

Roku

ASML Logo

ASML

ZocDoc Logo

ZocDoc

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a year ago
Statistics
a year ago
What is a probability distribution that deviates from the typical normal distribution? Would you mind giving an instance of where it might be useful?
Data Scientist

Roku

Venmo Logo

Venmo

Sprinklr Logo

Sprinklr

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a year ago
Statistics
a year ago
Explain the importance of the Wilk-Shapiro measure when analyzing data in various fields, including business, finance, and science.
Data Scientist

Roku

Coursera Logo

Coursera

Nutanix Logo

Nutanix

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a year ago
Statistics
a year ago
How could you make the concept of regression accessible to someone with no stats experience?
Data Scientist

Roku

Snowflake Logo

Snowflake

Dollar Shave Club Logo

Dollar Shave Club

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a year ago
Behavioral
a year ago
What are the ways in which you can be effective by utilizing different communication styles?
Data ScientistBackend EngineerProduct ManagerTechnical Program Manager

Roku

Festicket Logo

Festicket

CarDekho Logo

CarDekho

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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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