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CCA-500 · Question #22
CCA-500 Question #22: Real Exam Question with Answer & Explanation
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Question
You have installed a cluster HDFS and MapReduce version 2 (MRv2) on YARN. You have no dfs.hosts entry(ies) in your hdfs-site.xml configuration file. You configure a new worker node by setting fs.default.name in its configuration files to point to the NameNode on your cluster, and you start the DataNode daemon on that worker node. What do you have to do on the cluster to allow the worker node to join, and start sorting HDFS blocks?
Options
- AWithout creating a dfs.hosts file or making any entries, run the commands hadoop.dfsadmin-
- BRestart the NameNode
- CCreating a dfs.hosts file on the NameNode, add the worker Node's name to it, then issue the
- DNothing; the worker node will automatically join the cluster when NameNode daemon is started
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