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What two processes must you do if you are running a Hadoop cluster with a...

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What two processes must you do if you are running a Hadoop cluster with a single NameNode and six DataNodes, and you want to change a configuration parameter so that it affects all six DataNodes. (Choose two)

A.

You must modify the configuration files on the NameNode only. DataNodes read their configuration from the master nodes

B.

You must modify the configuration files on each of the DataNodes machines

C.

You don’t need to restart any daemon, as they will pick up changes automatically

D.

You must restart the NameNode daemon to apply the changes to the cluster

E.

You must restart all six DatNode daemon to apply the changes to the cluster

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