what are some of your strengths and weaknesses
Research Scientist Interview Questions
14,629 research scientist interview questions shared by candidates
What is the difference between bagging and boosting algorithms
What would I estimate as metrics for ab test ?
Say you notice a surge in average activity among users but the number of users is down, how would you explain this?
If you implement a new feature to FB how would you measure the success
How do you measure newsfeed health?
What is the most important thing about being a scientist?
Given an array of sorted numbers ex: [1,1,1,2,2,2,2,2,2,2,3,3,3,3] find the indices where a single number starts and ends (ex: 1, start index=0, end_index=2). You have to solve this in log(n) complexity, you cannot go through every sample (n complexity).
Two tables: User actions: date|sessio_id|userid|event session details: date|Sessionid|timespent_Sec|userid 1. Identify avg time spent per user per day 2. Create a histogram of duration on x axis, no of users on y axis which is populated by volume in each bucket Product questions: 1. Wants to add a new banner on FB Market place which suggests to sell something on facebook , should they do it, what should be done to evaluate it ? 2. Market place transactions happen through messages - these messages went down by 10% in a month, should they be worried ? How would you go about analyzing it?
The SQL question was quite easy. Given a table with detailed customer complaint tickets of different types, calculate the share of processed tickets within each type.
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