Do you have any best practices or tips that you would add to the ones discussed in Lesson 6?
1.Use ReduceByKey instead of GroupByKey
When would you use ReduceByKey instead of GroupByKey? Can you share details?
Just to let the moderator know that there is an error in the Spark Developer Certification Guide in the sample questions 6. The answer to this question is C and not D. D is for the descending sort order.
Retrieving data ...