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.
A.
You must restart the NameNode daemon to apply the changes to the cluster
B.
You don’t need to restart any daemon, as they will pick up changes automatically
C.
You must modify the configuration files on each of the six SataNodes machines
D.
You must modify the configuration files on the NameNode only. DataNodes read their
configuration from the master nodes
E.
You must restart all six DatNode daemon to apply the changes to the cluster