Explanation:Reducer has 3 primary phases: shuffle, sort and reduce. 9. The framework groups Reducer inputs by key in _________ stage.
A. sort
B. shuffle
C. reduce
D. None of the mentioned
Answer:A
Explanation:Reducer has 3 primary phases: shuffle, sort and reduce. 9. The framework groups Reducer inputs by key in _________ stage.
A. sort B. shuffle C. reduce D. None of the mentioned
Explanation:The shuffle and sort phases occur simultaneously; while map-outputs are being fetched they are merged. 10. The output of the reduce task is typically written to the FileSystem via _____________ .