Data Science Interview Questions
Questions Answers Views Company eMail

How do you handle missing values in python or r?

101

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?

91

What is a z test?

121

Why do you need a for loop?

104

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

93

Where linear optimization is used?

95

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.

106

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?

130

what is json and what is xml?

108


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Un-Answered Questions { Data Science }

What is the job of analytics?

111


What is nosql? Name some examples of nosql databases.

124


Explain how to operate on file and directory?

95


What is Survival Analysis?

127


Why is DBSCAN required?

103






Print the elements of a matrix in zig-zag manner.

104


What are the various types of selection bias?

110


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

95


Which objects are iterated in python?

120


How will you decide which version (Version 1 or Version 2) of the Surge Pricing Algorithms is working better for Uber ?

130


Define the unit test with PyUnit?

107


A test has a true positive rate of 100% and false positive rate of 5%. There is a population with a 1/1000 rate of having the condition the test identifies. Considering a positive test, what is the probability of having that condition?

250


Do you need a teacher to be a scientist?

105


What is churn?

115


How do you check for data quality?

109