The JobTracker pushes work out to available _______ nodes in the cluster, striving to keep the work as close to the data as possible.

A)  TaskTracker
B)  DataNodes
C)  ActionNodes
D)  All of the above

Correct Answer :   DataNodes

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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