Spark Programming - Which of the following is not right way of controlling... | Automated hands-on| CloudxLab

Which of the following is not right way of controlling number of partitions?

Specify number of partitions in sc.parallelize and sc.textFile
Passing number of partitions shuffling operations such as reduceByKey, sort
By the way of partitioning (e.g. hashPartitioner or RangePartitioner)
Using coalesce()
Using map()

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