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CCA-500 · Question #12
CCA-500 Question #12: Real Exam Question with Answer & Explanation
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Question
Assuming a cluster running HDFS, MapReduce version 2 (MRv2) on YARN with all settings at their default, what do you need to do when adding a new slave node to cluster?
Options
- ANothing, other than ensuring that the DNS (or/etc/hosts files on all machines) contains any entry
- BRestart the NameNode and ResourceManager daemons and resubmit any running jobs.
- CAdd a new entry to /etc/nodes on the NameNode host.
- DRestart the NameNode of dfs.number.of.nodes in hdfs-site.xml
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