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What motivates you to transition from academia to data science?
A stranger uses a search engine to find something and you do not know anything about the person. How will you design an algorithm to determine what the stranger is looking for just after he/she types few characters in the search box?
Define standard deviation, mean, mode and median.
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?
What kind of product you want to build at LinkedIn?
How will you explain JOIN function in SQL to a 10 year old ?
What is the probability of pulling a different shape or a different colour card from a deck of 52 cards?
Given 2 vectors, how will you generate a sorted vector?
Create a program in a language of your choice to read a text file with various tweets. The output should be 2 text files-one that contains the list of all unique words among all tweets along with the count for repeated words and the second file should contain the medium number of unique words for all tweets.
What do you understand by parametric and non-parametric methods? Explain with examples.
State some use cases where Hadoop MapReduce works well and where it does not.
You can roll a dice three times. You will be given $X where X is the highest roll you get. You can choose to stop rolling at any time (example, if you roll a 6 on the first roll, you can stop). What is your expected pay-out?
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?
How will you fix multi-colinearity in a regression model?
What are the metrics you will use to track if Uber's paid advertising strategies to acquire customers work? How will you figure out the acceptable cost of customer acquisition?
