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Spark
Data Engineer
Spark questions
10 questions on Spark for data engineers, easiest first.
Easy
2
When Spark actually runs
easy
What a Spark partition is
easy
Medium
4
What causes a shuffle
medium
Joining with a small lookup table
medium
When to cache in Spark
medium
repartition vs coalesce
medium
Hard
4
One task takes forever
hard
Which late event is kept
hard
A slow Python UDF in PySpark
hard
Overwrite deleted the whole table
hard
