What are numpy, scipy, and spark essential datatypes?
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How can you decide if one algorithm is better than the other?
In k-means or knn, we use euclidean distance to calculate the distance between nearest neighbors. Why not manhattan distance?
Why data science and data scientists are needed?
Can you explain cross-validation?
What is back propagation?
There are 8 identical balls and only one of the ball is slightly heavier than the others. You are given a balance scale to find the heavier ball. What is the least number of times you have to use the balance scale to find the heavier ball?
What is logistic and linear regression? Name some packages in r and python for building regression models.
What skills do you need to be a data analyst?
What are big data and data science?
What do you mean by cluster sampling and systematic sampling?
Why data cleaning plays a vital role in analysis?
Why is resampling done?
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