Cloudera
CCA-410 · Question #83
CCA-410 Question #83: Real Exam Question with Answer & Explanation
The correct answer is A. You must restart the NameNode daemon to apply the changes to the cluster F. You must modify the configuration files on the NameNode only. DataNodes read their configuration. See the full explanation below for the reasoning.
Question
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.
Options
- AYou must restart the NameNode daemon to apply the changes to the cluster
- BYou must restart all six DataNode daemons to apply the changes to the cluster.
- CYou don't need to restart any daemon, as they will pick up changes automatically.
- DYou must modify the configuration files on each of the six DataNode machines.
- EYou must modify the configuration files on only one of the DataNode machine
- FYou must modify the configuration files on the NameNode only. DataNodes read their configuration
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