1.

The JobTracker pushes work out to available _______ nodes in the cluster, striving to keep the work as close to the data as possible.(a) DataNodes(b) TaskTracker(c) ActionNodes(d) All of the mentioned

Answer» Right choice is (b) TaskTracker

Best explanation: A heartbeat is sent from the TaskTracker to the JobTracker every few minutes to check its status whether the node is dead or alive.


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