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SQL

a year ago

In what ways do you think measuring monthly retention is important for this company?

Data Scientist

Visa

Twitch

Improbable

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a year ago

Statistics

a year ago

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

Data Scientist

Visa

Coupang

Hootsuite

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a year ago

CodingStatistics

a year ago

How would you code a shuffle() function that randomizes an array uniformly using roll()?

Data Scientist

Visa

Intel

InVision

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a year ago

ML Knowledge

a year ago

How does information theory serve in the comparison of language models? Provide an instance of how you might apply this in practice.

Data Scientist

Visa

ASML

Audible

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a year ago

Coding

a year ago

How can you implement a function to compute the longest path in a given DAG?

Data ScientistMachine Learning Engineer

Visa

Samsara

Venmo

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a year ago

ML Knowledge

a year ago

What separates LSTMs from RNNs in terms of memory and sequential data processing?

Data ScientistMachine Learning Engineer

Visa

Tokopedia

StubHub

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a year ago

ML Knowledge

a year ago

Explain the concept of gradient boost and how it works in the context of machine learning?

Data Scientist

Visa

ZocDoc

Tokopedia

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a year ago

Coding

a year ago

Can you devise an algorithm for determining the maximal sum of any subarray of size k from a given array of integers?

Data Scientist

Visa

Redfin

Shutterstock

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a year ago

Behavioral

a year ago

Tell me about a time you've had to change the way you work.

Data ScientistEngineering ManagerUX DesignerUX Researcher

Visa

Bloomberg

Lam Research

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a year ago

Statistics

a year ago

When conducting a hypothesis test, what are type I and type II errors, and which one do you believe is the greater of the two?

Data Scientist

Visa

AppDynamics

BetterUp

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a year ago

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

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