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Q11 Single choice

The code block shown below contains an error. The code block is intended to return a new 12-partition DataFrame from the 8-partition DataFrame storesDF by inducing a shuffle. Identify the error.

Code block:

storesDF.coalesce(12)

A
The coalesce() operation cannot guarantee the number of target partitions - the repartition() operation should be used instead.
B
The coalesce() operation does not induce a shuffle and cannot increase the number of partitions - the repartition() operation should be used instead.
C
The coalesce() operation will only work if the DataFrame has been cached to memory - the repartition() operation should be used instead.
D
The coalesce() operation requires a column by which to partition rather than a number of partitions - the repartition() operation should be used instead.
E
The number of resulting partitions, 12, is not achievable for an 8-partition DataFrame.

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