Can you define feature vector?
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Why is Python used in data science?
What is column storage? What is a document database?
How will you explain JOIN function in SQL to a 10 year old ?
Which database is best for data science?
What is nosql? Name some examples of nosql databases. What is a key value store? What is column storage? What is a document database?
In k-means or knn, we use euclidean distance to calculate the distance between nearest neighbors. Why not manhattan distance?
Pick up a coin C1 given C1+C2 with probability of trials p (h1) =.7, p (h2) =.6 and doing 10 trials. And what is the probability that the given coin you picked is C1 given you have 7 heads and 3 tails?
Explain the decision tree algorithm, and how is it different from the random forest algorithm?
Write a function to check whether a particular word is a palindrome or not.
What is clustering? What is the difference between kmeans clustering and hierarchical clustering?
What is missing value imputation?
Why is resampling done?
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