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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.
337You 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?
296You 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?
324What 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?
Uber,
273How will you design the heatmap for Uber drivers to provide recommendation on where to wait for passengers? How would you approach this?
Uber,
1682Case 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?
435Which technique will you use to compare the performance of two back-end engines that generate automatic friend recommendations on Facebook?
416You 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.
380Post New Data Science Questions
Do you have some knowledge of R - analyse a given dataset in R?
You are given a training dataset of users that contain their demographic details, the pages on Facebook they have liked so far and results of psychology test based on their personality i.e. their openness to like FB pages or not. How will you predict the age, gender and other demographics of unseen data?
What will be your expected earnings with the two roll strategy?
How will you design a recommendation engine for jobs?
What are the drawbacks of the linear model?
Explain the goal of a/b testing?
why do you need to perform resampling?
What is clustering? What is the difference between kmeans clustering and hierarchical clustering?
Burn two ropes, one needs 60 minutes of time to burn and the other needs 30 minutes of time. How will you achieve this in 45 minutes of time ?
What is meant by logistic regression?
Explain while working on a data set, how do you select important variables?
Where is association analysis used?
Explain root cause analysis?
What is meant by classical ANOVA?
What do you understand by statistical power of sensitivity and how do you calculate it?
