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SQL
2 years ago
What are the key differences between a left join and an inner join?
Data Scientist

Rovio

Meta

Zomato

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2 years ago
Statistics
2 years ago
In what way can you calculate the probability of a correct guess for a card drawn at random from a deck?
Data Scientist

Rovio

Deliveroo Logo

Deliveroo

Riot Games Logo

Riot Games

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2 years ago
ML Knowledge
2 years ago
Decision trees and bias and variance - could you give us insight into how they relate? And in particular, which of those two is more tricky to manage: high bias or high variance, and what's the explanation behind that?
Data Scientist

Rovio

Elastic Logo

Elastic

Rivian Logo

Rivian

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2 years ago
ML Knowledge
2 years ago
How would you describe the mechanism of collaborative filtering in an ML setting?
Data Scientist

Rovio

NetSuite Logo

NetSuite

Sony Logo

Sony

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2 years ago
ML Knowledge
2 years ago
Could you discuss the disparity between bias and variance in machine learning?
Data Scientist

Rovio

Avito Logo

Avito

Mastercard Logo

Mastercard

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2 years ago
Statistics
2 years ago
Could you provide an explanation for what the X and Y axes of a ROC curve stand for and how they relate to interpreting results?
Data Scientist

Rovio

Ticketmaster Logo

Ticketmaster

Robinhood Logo

Robinhood

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2 years ago
Statistics
2 years ago
At what point would the outcomes of a coin flip become statistically significant enough to determine if the coin is fair?
Data Scientist

Rovio

Ola Logo

Ola

Autodesk Logo

Autodesk

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2 years ago
Coding
2 years ago
Can you create a code snippet that simulates rolling a fair die and explain how to test its fairness?
Data ScientistMachine Learning Engineer

Rovio

Zenefits Logo

Zenefits

VeriSign Logo

VeriSign

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2 years ago
Coding
2 years ago
Identify all out of a list of provided words which are blanagrams.
Data Scientist

Rovio

Okta Logo

Okta

Airbnb Logo

Airbnb

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2 years ago
Coding
2 years ago
Create an object class in Python to iterate over sequences.
Data Scientist

Rovio

DoorDash Logo

DoorDash

Ola Logo

Ola

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2 years ago

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

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