I applied online. I interviewed at ALDI DX (Müllheim) in Jan 2024
Interview
As they were mass hiring, there were only two rounds of interviews.
First general HR questions, and afterwards a technical interview. At the time of my interview in 2024, there was no direct coding skills interview, but that changed now.
Interview questions [1]
Question 1
Explain the internals of Spark (i.e MapReduce), which parts of an example query need data shuffle and which do not (narrow and wide transformations), how does parquet differ from CSV (column based concepts), what is the advantage of Delta Lake (ACID transofrmations)
