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Coding
a year ago
You are given an array of integers, and you are asked to determine the subarray of length k with the maximum possible sum. How would you approach this task?
Data Scientist

Walmart

Splunk

Cloudera

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a year ago
ML Knowledge
a year ago
When might overfitting and underfitting occur in a real-world setting? What are some of the effects these occurrences can have on model accuracy and performance?
Data Scientist

Walmart

DigitalOcean Logo

DigitalOcean

Bill.com Logo

Bill.com

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a year ago
Statistics
a year ago
In simple terms, how would you convey the meaning of the P-value to a layperson on the team?
Data Scientist

Walmart

Illumina Logo

Illumina

BetterUp Logo

BetterUp

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a year ago
Statistics
a year ago
Can you illustrate the differences between right-skewed and left-skewed distributions, particularly where the mean and median are placed in contrast to a normal distribution?
Data Scientist

Walmart

Workday Logo

Workday

CrowdStrike Logo

CrowdStrike

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a year ago
Behavioral
a year ago
Can you describe a recent failure that has taught you something? In what way has it made you a better Data Scientist?
Data Scientist

Walmart

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a year ago
ML Knowledge
a year ago
How does the curse of dimensionality affect high-dimensional datasets, and what remedy would you apply?
Data Scientist

Walmart

Groupon Logo

Groupon

New Relic Logo

New Relic

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a year ago
Coding
a year ago
How would you utilize a hash table to efficiently solve the two sum problem in O(n) time complexity?
Data Scientist

Walmart

Spotify Logo

Spotify

Teradata Logo

Teradata

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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

Walmart

WeWork Logo

WeWork

Bolt Logo

Bolt

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a year ago
Coding
a year ago
Develop a function to simulate a normal distribution and provide a visual plot of it.,
Data Scientist

Walmart

SoFi Logo

SoFi

Qualcomm Logo

Qualcomm

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a year ago
Behavioral
a year ago
Would you mind sharing a difficult piece of feedback you received and how you handled it?
Data ScientistFull Stack Software EngineerFrontend EngineerProgram Manager

Walmart

Bol.com Logo

Bol.com

Staples Logo

Staples

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a year ago

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

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