Data Science Interview Questions
Questions Answers Views Company eMail

What is the difference between supervised and unsupervised methods?

119

What is a z test, chi square test, f test and t test?

118

What packages are used for data mining in python and r?

101

What are the various classification algorithms?

113

What is data science? Also, list the differences between supervised and unsupervised learning.

105

A certain couple tells you that they have two children, at least one of which is a girl. What is the probability that they have two girls?

190

List the differences between supervised and unsupervised learning.

108

How does data cleaning plays a vital role in analysis?

186

What is back propagation and explain it’s working.

100

What is the role of activation function?

116

Explain the structure of artificial neural networks?

109

Explain the difference between a validation set and a test set?

109

In any 15-minute interval, there is a 20% probability that you will see at least one shooting star. What is the proba­bility that you see at least one shooting star in the period of an hour?

224

How can you generate a random number between 1 – 7 with only a die?

251

What is the difference between “long” and “wide” format data?

104


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Un-Answered Questions { Data Science }

Discuss artificial neural networks

89


What is pylab?

99


How can you deal with different types of seasonality in time series modelling?

111


What is logistic and linear regression? How do you treat multicollinearity and heteroscedasticity in regression? Name some packages in r and python for building regression models.

107


How will you compare the results of various machine learning algorithms?

135






What is a z test, chi square test, f test and t test?

118


Explain reinforcement learning.

93


Which laptop is best for data analysis?

92


How can you solve a problem that has no solution?

109


Explain the term binomial probability formula?

79


Case Study based questions - Cars are implanted with speed tracker so that the insurance companies can track about our driving state. Based on this new scheme what kind of business questions can be answered?

228


What are apis used for?

93


Explain p-value?

90


What are an eigenvalue and eigenvector?

87


What do you understand by the selection bias? What are its various types?

112