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Real questions from top companies · medium
What is broadcasting in Spark, and why is it used? Can you give an example of its use?
What is the difference between map and flatMap in Spark, and when would you use each?
What is the purpose of the Bronze, Silver, and Gold layers in a data pipeline?
What work is done by the executor memory in Spark?
When and how do you use Broadcast Join?
Write a Python script to find the count of each word in a text file using Spark.
Write the PySpark code to find the second highest salary in each department.
Write a Python function to check if a string is a palindrome.
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