Data Science Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Data Science Interview Questions

Questions Answers Views Company eMail

How do you handle missing values in python or r?

What is a document database?

176

Define a sql query? How do you use sql in sas, python, r languages?

120

Why do you need a for loop? How do you do for loops in python and r?

119

What is random forests and how is it different from decision trees?

What is a z test?

119

Why do you need a for loop?

104

How would churn help predict and control churn for a customer?

Where linear optimization is used?

What is an api? What are apis used for?

109

What is logistic and linear regression? Name some packages in r and python for building regression models.

104

What is t test?

102

What is the travelling salesman problem?

102

Define a sql query? What is the difference between select and update query?

128

what is json and what is xml?

106

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Un-Answered Questions { Data Science }

What does sas stand out to be the best over other data analytics tools?

110

Does the data scientist need to know programming?

122

Explain the term "data warehouse".

Differentiate between skewed and uniform distribution?

109

What is the supervised learning?

110

Define an algorithm to discover when a person is starting to search for new job.

136

Explain reinforcement learning.

Explain the differences between bivariate and multivariate analysis?

106

What is the 80/20 rule? Explain its importance in model validation?

Define boltzmann machine

Please explain recommender systems along with an application?

106

Explain principal components analysis with equations.

Advantages of tableau prep?

107

How do you use lambda in python?

100

You are at a Casino. You have two dices to play with. You win $10 every time you roll a 5. If you play till you win and then stop, what is the expected pay-out?

138

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