How can I become a data scientist?

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What is the return type of the function ID?

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How are confidence intervals constructed and how will you interpret them?

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

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What is the central limit theorem? How is a normal distribution different from chi square distribution?

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You are given two tables- friend_request and request_accepted. Friend_request contains requester_id, time and sent_to_id and request_accepted table contains time, acceptor_id and requestor_id. How will you determine the overall acceptance rate of requests?

0 Answers   Facebook,

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You have two sorted array of integers, write a program to find a number from each array such that the sum of the two numbers is closest to an integer i.

0 Answers   Adobe,

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

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How will you compare the results of various machine learning algorithms?

0 Answers   Uber,

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What is column storage? What is a document database?

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You are about to get on a plane to Seattle, you want to know whether you have to bring an umbrella or not. You call three of your random friends and as each one of them if it's raining. The probability that your friend is telling the truth is 2/3 and the probability that they are playing a prank on you by lying is 1/3. If all 3 of them tell that it is raining, then what is the probability that it is actually raining in Seattle.

0 Answers   Facebook,

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Please explain the role of data cleaning in data analysis.

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