Data Engineer Interview Questions

21,114 data engineer interview questions shared by candidates

First question was on palindromic strings of 0s and 1s that I spent too much time on, The second question was "simple" sliding window question on memory allocation. It's funny that I have been in long meetings to discuss this kind of logic, but somehow there was an expectation that I would code this on the spot. Yeah, I failed the tech hazing here. The system design questions were really well-made. I honestly had a lot of fun answering those. Lots of things about availability, architecture, and databases.
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Senior Data Engineer

Interviewed at Amazon

3.5
May 26, 2022

First question was on palindromic strings of 0s and 1s that I spent too much time on, The second question was "simple" sliding window question on memory allocation. It's funny that I have been in long meetings to discuss this kind of logic, but somehow there was an expectation that I would code this on the spot. Yeah, I failed the tech hazing here. The system design questions were really well-made. I honestly had a lot of fun answering those. Lots of things about availability, architecture, and databases.

It wasn't the sort of interview you could characterise by listing questions. Each interview probed a different facet of the job (e.g. database knowledge, customer skills, coding, etc.). They were all disconnected: I had the impression I was interviewing for 8 different jobs.
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Principal Data Engineer

Interviewed at Amazon

3.5
Jan 13, 2021

It wasn't the sort of interview you could characterise by listing questions. Each interview probed a different facet of the job (e.g. database knowledge, customer skills, coding, etc.). They were all disconnected: I had the impression I was interviewing for 8 different jobs.

Three SQL queries one was to JOIN two tables to pull required results. Second was about Group & Order by. Third was Window query all very simple and basic. One Python related to write a function to sort an array so it produce only odd numbers.
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Data Engineer

Interviewed at Amazon

3.5
Jun 16, 2021

Three SQL queries one was to JOIN two tables to pull required results. Second was about Group & Order by. Third was Window query all very simple and basic. One Python related to write a function to sort an array so it produce only odd numbers.

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