What is collaborative filtering?
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What is the basic responsibility of a data scientist?
Can you explain difference between data modeling and database design?
What are the key elements of the statistical graphics?
Could you explain how to define the number of clusters in a clustering algorithm?
What is an Eigenvalue and Eigenvector?
Explain the structure of artificial neural networks?
Different between overfitting and underfitting?
Describe univariate, bivariate and multivariate analysis?
You are creating a report for user content uploads every month and observe a sudden increase in the number of upload for the month of November. The increase in uploads is particularly in image uploads. What do you think will be the cause for this and how will you test this sudden spike?
How do you take millions of users with 100's of transactions each, amongst 10000's of products and group the users together in a meaningful segments?
What is skewed distribution & uniform distribution?
How can you assess a good logistic model?
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