A building has 100 floors. Given 2 identical eggs, how can you use them to find the threshold floor? The egg will break from any particular floor above floor N, including floor N itself.

0 Answers   Facebook,

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What assumptions does linear regression machine learning algorithm make?

0 Answers   WalMart,

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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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There are 8 identical balls and only one of the ball is slightly heavier than the others. You are given a balance scale to find the heavier ball. What is the least number of times you have to use the balance scale to find the heavier ball?

0 Answers   Goldman Sachs,

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How to determine the number of clusters in k-means clustering algorithm?

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Which database is best for data science?

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A test has a true positive rate of 100% and a false-positive rate of 5%. There is a population with a 1/1000 rate of having the condition the test identifies. Considering a positive test, what is the probability of having that condition?

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What is machine learning and how can it be used for time series analysis?

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You are at a Casino. You have two dices to play with. You win $10 every time you roll a 5. If you play till you win and then stop, what is the expected pay-out?

0 Answers   Facebook,

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You have 2 dices. What is the probability of getting at least one 4? Also find out the probability of getting at least one 4 if you have n dices.

0 Answers   Facebook,

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Name three disadvantages of using a linear model?

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Why is data cleaning essential in data science?

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