Data Science Interview Questions
Questions Answers Views Company eMail

What will you do if removing missing values from a dataset cause bias?

Airbnb,

116

How can you reduce bias in a given data set?

Airbnb,

124

How will you impute missing information in a dataset?

Airbnb,

117

Estimate the probability of a disease in a particular city given that the probability of the disease on a national level is low.

Amazon,

119

How will inspect missing data and when are they important for your analysis?

Amazon,

155

How will you decide whether a customer will buy a product today or not given the income of the customer, location where the customer lives, profession and gender? Define a machine learning algorithm for this.

Amazon,

107

From a long sorted list and a short 4 element sorted list, which algorithm will you use to search the long sorted list for 4 elements.

Amazon,

118

How can you compare a neural network that has one layer, one input and output to a logistic regression model?

Amazon,

118

How do you treat colinearity?

Amazon,

108

How will you deal with unbalanced data where the ratio of negative and positive is huge?

Amazon,

112

What is the difference between Stack and Queue

Amazon,

142

What is the difference between Linkedin and Array

Amazon,

109

You are about to get on a plane to Seattle, you want to know whether you have to bring an umbrella or not. You call three of your random friends and as each one of them if it's raining. The probability that your friend is telling the truth is 2/3 and the probability that they are playing a prank on you by lying is 1/3. If all 3 of them tell that it is raining, then what is the probability that it is actually raining in Seattle.

Facebook,

111

You have been given the data on Facebook user's friending or defriending each other. How will you determine whether a given pair of Facebook users are friends or not?

Facebook,

119

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

Goldman Sachs,

116


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Un-Answered Questions { Data Science }

What’s the difference between pip and pip3?

118


How have you overcome a barrier to finding a solution?

87


What is the probability of pulling a different shape or a different colour card from a deck of 52 cards?

99


What is the return type of the function ID?

130


How many big Macs does McDonald sell every year in US?

98






Explain the difference between overfitting and underfitting?

113


How do you use goal seek in excel?

109


Explain how to define the number of clusters in a clustering algorithm?

166


Can you define cluster sampling?

95


What are Important things to remember for ggplot?

116


What are feature vectors?

120


What are outlier values?

134


Explain how to merge the files into a single dataframe?

127


What do you know about autoencoders?

115


What do you understand by Poisson distribution?

106