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Statistics
2 years ago
Can you give a straightforward explanation of what a P-value is for someone without a technical background?
Data Scientist
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Roku

Illumina Logo

Illumina

BetterUp Logo

BetterUp

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2 years ago
Behavioral
2 years ago
Can you describe how Roku's mission aligns with your long-term goals
Data Scientist
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Roku

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2 years ago
Behavioral
2 years ago
Would you change anything to make Roku better?
Data Scientist
Roku Logo

Roku

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2 years ago
SQL
2 years ago
In your experience, have you found that using subqueries is quicker than joining tables?
Data Scientist
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Roku

trivago Logo

trivago

eToro Logo

eToro

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2 years ago
ML Knowledge
2 years ago
In what ways do CNNs and RNNs vary, particularly in how they process data?
Data Scientist
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Roku

Expedia Logo

Expedia

Ubisoft Logo

Ubisoft

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2 years ago
ML Knowledge
2 years ago
Could you give me some concrete examples of where overfitting and underfitting are problematic in real-world situations? What are the repercussions for the accuracy and performance of models?
Data Scientist
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Roku

DigitalOcean Logo

DigitalOcean

Bill.com Logo

Bill.com

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2 years ago
Coding
2 years ago
How can a binary tree be reconstructed from its given preorder and inorder traversal results?
Data Scientist
Roku Logo

Roku

eBay Logo

eBay

Samsung Logo

Samsung

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2 years ago
Statistics
2 years ago
Could you explain what type 1 errors are? If we filter out all measurements below the mean while modifying the sampling distribution, how does it influence the possibility of making type 1 errors?
Data Scientist
Roku Logo

Roku

Zalando Logo

Zalando

Netflix Logo

Netflix

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2 years ago
ML Knowledge
2 years ago
Which activation function, ReLU or sigmoid, offers a better solution to the vanishing gradient problem?
Data ScientistMachine Learning Engineer
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Roku

DigitalOcean Logo

DigitalOcean

Faire Logo

Faire

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2 years ago
SQL
2 years ago
Write a query to calculate the rolling average of a certain metric over a period of time?
Data Scientist
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Roku

Riot Games Logo

Riot Games

Expedia Logo

Expedia

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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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