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Data Interview Questions
132,688 data interview questions shared by candidates
What is a clustered/non clustered index.
Do you have QC data management experience?
(In response to stating VMware lun sizing best practice) Why would volume management of smaller luns result in lower performance than a large lun (meta)?
What are your feelings about repetitive work?
what is the differnce between hash and nested-loop join
How many cows are in Canada
Describe yourself
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.
You're about to get on a plane to Seattle. You want to know if you should bring an umbrella. You call 3 random friends of yours who live there and ask each independently if it's raining. Each of your friends has a 2/3 chance of telling you the truth and a 1/3 chance of messing with you by lying. All 3 friends tell you that "Yes" it is raining. What is the probability that it's actually raining in Seattle?
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