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21,097 data engineer interview questions shared by candidates

There were questions like "what technologies would you choose for your next project if you had $1m" without specifying any project-related info/requirements or even the underlying data for which you should pick the tools.
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Data Engineer

Interviewed at Semrush

4★
Mar 29, 2023

There were questions like "what technologies would you choose for your next project if you had $1m" without specifying any project-related info/requirements or even the underlying data for which you should pick the tools.

ADF: scenario based Pyspark: Coalesce vs repartition wide vs narrow transformation spark architecture one dataset to apply pivot transformation SQL: two questions (department wise highest salary, SQL question using REPLACE function)
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Data Engineer

Interviewed at ValueMomentum

3.4★
Jun 14, 2023

ADF: scenario based Pyspark: Coalesce vs repartition wide vs narrow transformation spark architecture one dataset to apply pivot transformation SQL: two questions (department wise highest salary, SQL question using REPLACE function)

You are given a sorted array with repeated numbers. [1,1,1,3,3,3,3,3,4,5,6,6,6] Your task is to return the array by not repeating any number more than twice. And the array count. (In place) Output : [1,1,3,3,4,5,6,6]
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Senior Data Engineer

Interviewed at Delivery Hero

3.5★
Nov 10, 2021

You are given a sorted array with repeated numbers. [1,1,1,3,3,3,3,3,4,5,6,6,6] Your task is to return the array by not repeating any number more than twice. And the array count. (In place) Output : [1,1,3,3,4,5,6,6]

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