data question: dialoglog (userid int appid int type char , a flag either "imp" or "click" ds timestamp ) How would you access the quality of app? How to compute click-through rate (in mySQL)?
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SQL question: given a table of interaction between users (user_a | user_b | day), find number of users who had more than 5 interactions yesterday (assume there is only one unique interaction between a pair of users per day). Product Question: A user satisfaction survey was conducted for two groups of facebook users (each with 50 k sample size). Group1: who had enabled certain login security features Group 2: who had not enabled these security features. It was found that user satisfaction with group1 was 30% lower than with group 2. Why do you think so? Comment on how the survey was conducted?
Given a table of friend requests sent and friend requests received, find the user with the most friends.
Print a linked list in reverse recursively and non-destructively.
Given a table with columns country (with two-letter country abbreviation), count of requests sent, percentage of requests sent failed, condense down to this data grouped by country: country (one row per country), total count of requests sent, total count of requests sent failed.
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Questions related to data structures like "What data structure would you use for a browser's BACK & FORWARD ability"
Find all duplicate files by content in your filesystem.
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