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CCA-410 · Question #16
CCA-410 Question #16: Real Exam Question with Answer & Explanation
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Question
Your Hadoop cluster contains nodes in three racks. Choose which scenario results if you leave the dfs.hosts property in the NameNode's configuration file empty (blank)?
Options
- AThe NameNode will update dfs.hosts property to include machines running the DataNode daemon on
- BAny machine running the DataNode daemon can immediately join the cluster.
- CPresented with a blank dfs.hosts property, the NameNode will permit DataNodes specified in mapred.hosts
- DNo new can be added to the cluster until you specify them in the dfs.hosts file.
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