What is an outlier? How do you treat outlier data?

299

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What is column storage?

383

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How is random forests different from decision trees?

433

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Name some kinds of graphs and explain how you would build them in python or r.

314

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How do you do data import in sas?

342

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What is churn? How would it help predict and control churn for a customer?

364

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Which package is used to do data import in r and python? How do you do data import in sas?

333

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What is clustering? What is the difference between kmeans clustering and hierarchical clustering?

393

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What is advantage of using apply family of functions in r?

353

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How do you use lambda in python?

371

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What is the difference between kmeans clustering and hierarchical clustering?

430

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What is the difference between supervised and unsupervised methods?

385

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What is a z test, chi square test, f test and t test?

358

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What packages are used for data mining in python and r?

347

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What are roles in cqlsh?

77

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