Apache Spark 3 for Data Engineering and Analytics with Python - Map and Flat Map Transformations

The video tutorial covers two RTD transformations: map and flat map. It begins with an introduction to these transformations, followed by a detailed explanation of the map transformation, including an example where a list of numbers is squared and transformed into a list of tuples. The tutorial then demonstrates how to create and print a transformed RDD using the map function. Finally, the flat map transformation is introduced, showing how it can flatten a list of words into a list of letters.

What is the significance of using a key-value pair in the context of transformations?

Explain how to create an RDD that stores transformed data using a Lambda function.

How can flat map be used to flatten a list of words into a list of letters?