Please explain eigenvectors and eigenvalues?

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What is chi-square tests?

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You have two tables-the first table has data about the users and their friends, the second table has data about the users and the pages they have liked. Write an SQL query to make recommendations using pages that your friends liked. The query result should not recommend the pages that have already been liked by a user.

0 Answers   Facebook,

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Define a sql query? What is the difference between select and update query? How do you use sql in sas, python, r languages?

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Write a function to check whether a particular word is a palindrome or not.

0 Answers   Microsoft,

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What is back propagation and explain it’s working.

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A box has 12 red cards and 12 black cards. Another box has 24 red cards and 24 black cards. You want to draw two cards at random from one of the two boxes, which box has a higher probability of getting cards of same colour and why?

0 Answers   Goldman Sachs,

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A dice is rolled twice, what is the probability that on the second chance it will be a 6?

0 Answers   Citi Bank,

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Case Study based questions - Cars are implanted with speed tracker so that the insurance companies can track about our driving state. Based on this new scheme what kind of business questions can be answered?

0 Answers   Mu Sigma,

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Explain the importance of 80/20 rule in model validation?

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Will Uber cause city congestion?

0 Answers   Uber,

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Are expected value and mean value different?

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