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Data Engineer Interview Questions
18,708 data engineer interview questions shared by candidates
Most of the questions from Spark and Scala.
joins, unions, window functions, subqueries.
Rental car service design question
Given two strings s1 and s2, tell if s1 is a rotation of s2.
Q. Find the top performing merchants for each day. Q. Write a query to find the total number of customers and the first time customers who ordered with the top-performing merchant that day. First time customers are the customers who ordered never before that delivery date. Q. Find top performing merchants for each day with the Total_Amount_Earned on the previous day.
what is an inode
come avresti disegnato il seguente DB data le richieste dell'esercizio a casa?
How to process multiple files (JSON, ORC & parquet) In aZure stack.
Como carregar um arquivo de formato .parquet utilizando Python
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