Explanation:In reduce phase the reduce(Object, Iterator, OutputCollector, Reporter) method is called for each pair in the grouped inputs. 9. Applications can use the _________ provided to report progress or just indicate that they are alive.
A. Collector
B. Reporter
C. Dashboard
D. None of the mentioned
Answer:A
Explanation:In reduce phase the reduce(Object, Iterator, OutputCollector, Reporter) method is called for each pair in the grouped inputs. 9. Applications can use the _________ provided to report progress or just indicate that they are alive.
A. Collector B. Reporter C. Dashboard D. None of the mentioned
Explanation:In scenarios where the application takes a significant amount of time to process individual key/value pairs, this is crucial since the framework might assume that the task has timed-out and kill that task. 10. Which of the following parameter is to collect keys and combined values ?