Explain data wrangling?
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Compare sas, r, python, perl?
Can you explain the difference between a Test Set and a Validation Set?
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.
Can you explain recommender system?
Define a/b testing?
What would you do to summarize a Twitter feed?
How to check the frequency distribution of a categorical variable?
How would you add value to the company through your projects?
What are iterators in Python?
What assumptions does linear regression machine learning algorithm make?
Why do you want to work as a data scientist?
What is the role of the activation function?