Find the second largest element in a Binary Search Tree
Data Scientists Interview Questions
54,195 data scientists interview questions shared by candidates
How would you test if survey responses were filled at random by certain individuals, as opposed to truthful selections?
You are compiling a report for user content uploaded every month and notice a spike in uploads in October. In particular, a spike in picture uploads. What might you think is the cause of this, and how would you test it?
The three data structure questions are: 1. the difference between linked list and array; 2. the difference between stack and queue; 3. describe hash table.
How would you build and test a metric to compare two user's ranked lists of movie/tv show preferences?
How do you take millions of users with 100's of transactions each, amongst 10k's of products and group the users together in a meaningful segments?
What made you interested in this position and this field of work?
Why Regeneron? Are you prepared for a job or a career? What unique lab skills will you bring to the department?
Describe past research and what you want to research in the future.
Write an SQL query that makes recommendations using the pages that your friends liked. Assume you have two tables: a two-column table of users and their friends, and a two-column table of users and the pages they liked. It should not recommend pages you already like.
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