Question: Which statement regarding processing task completion using Hado. program is correct? The TaskTrackers divide computing jobs up into well - defined tasks and move those

Which statement regarding processing task completion using Hado. program is correct?
The TaskTrackers divide computing jobs up into well-defined tasks and move those to the JobTracker.
MapReduce employs a JobTracker residing on the master server and TaskTrackers residing on other servers.
TaskTrackers ensure that only one server in the cluster operates on data at a time to maintain concurrency control.
After processing, subsets of data are reduced back from the central node to other nodes in the cluster.
Which statement regarding processing task

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