Explain the difference between the 'flatMap' and 'map' transformations in Spark.
PySpark and AWS: Master Big Data with PySpark and AWS - RDD (saveAsTextFile)

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2.
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What is the role of actions in Spark, particularly in relation to transformations?
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3.
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How does Spark ensure parallel processing of data across partitions?
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What are the implications of changing the number of partitions in an RDD?
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