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3 years ago

Can you tell me about the likelihood of making a type 1 error, please? If we adjust the sampling distribution by eliminating all measurements below the mean, how does this impact the possibility of making a type 1 error?

Data Scientist

Cognizant

Zalando

Netflix

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3 years ago

ML Knowledge

3 years ago

How do the data requirements differ between supervised, unsupervised, and reinforcement learning?

Data Scientist

Cognizant

Calm

Yahoo

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3 years ago

ML KnowledgeML Case

3 years ago

What are the difficulties faced when you have a model with a lot of layers?

Data Scientist

Cognizant

Anaplan

Skyscanner

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3 years ago

ML Knowledge

3 years ago

Please tell me about a machine learning model you’ve used and elucidate on its workings.

Data ScientistMachine Learning Engineer

Cognizant

BuzzFeed

Andela

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3 years ago

ML KnowledgeML Case

3 years ago

In what ways is R-square an incomplete metric for linear regression analysis? How do you justify a low R-square value in terms of linear regression model fit?

Data Scientist

Cognizant

Bloomberg

HubSpot

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3 years ago

Statistics

3 years ago

How do you define a median and what approach would you take to calculate it for a dataset that's too large for memory?

Data Scientist

Cognizant

Spotify

Marqeta

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3 years ago

ML Knowledge

3 years ago

Can you break down the concept and workflow of a Neural Network?

Data ScientistMachine Learning Engineer

Cognizant

SeatGeek

Productboard

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3 years ago

Behavioral

3 years ago

What do you think are your top three personality traits that make you successful? How do they align with Cognizant?

Data Scientist

Cognizant

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3 years ago

ML Knowledge

3 years ago

Describe how the attention mechanism works in neural networks.

Data Scientist

Cognizant

Convoy

Bloomberg

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3 years ago

Statistics

3 years ago

When you roll a die, you earn the number on the die. What is the reward's expected value?

Data Scientist

Cognizant

trivago

Marqeta

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3 years ago

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

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