Data Science Interview Questions
Questions Answers Views Company eMail

What is term Pearson’s Correlation Coefficient?

127

What is meant by feature vectors?

107

What is meant by R statistics?

109

Name Methods to Calculate Distance Measure?

117

Explain types of statistical data?

100

What functions are required to principal analysis in R?

182

What is need of principal component analysis?

172

What is meant by lattice graphs?

182

What do you understand by Linear Regression in R?

361

What are Principal components?

273

What is meant by lattice?

287

A dice is rolled twice, what is the probability that on the second chance it will be a 6?

Citi Bank,

110

On rolling a dice if you get $1 per dot on the upturned face,what are your expected earnings from rolling a dice?

70

You have two sorted array of integers, write a program to find a number from each array such that the sum of the two numbers is closest to an integer i.

Adobe,

111

How can you compute an inverse matrix faster by playing with some computation tricks?

Microsoft,

105


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Un-Answered Questions { Data Science }

You are given a training dataset of users that contain their demographic details, the pages on Facebook they have liked so far and results of psychology test based on their personality i.e. their openness to like FB pages or not. How will you predict the age, gender and other demographics of unseen data?

106


Different between overfitting and underfitting?

119


What are limitations of DBSCAN?

157


while working on a data set, how can you select important variables? Explain

133


Can you define data discretization?

79






What is the roc curve?

99


How is bagging different from boosting?

101


Estimate the number of square feet pizza's eaten in US each year.

114


What is the difference between Stack and Queue

142


What is the aim of a/b testing?

79


Name the packages that are based on density based on the algorithm?

95


How does data cleaning plays a vital role in analysis?

186


How to choose the right chart in case of creating a viz?

89


Explain collaborative filtering

105


What is the difference between select and update query?

97