Do we require two servers for the namenode and the datanodes?
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Are job tracker and task trackers present in separate machines?
what happens when namenode goes down during file read operation in hadoop?
is there a standard procedure to deploy hadoop?
Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?
What is Reducer in Hadoop?
How Big is ‘Big Data’?
Explain the core methods of the reducer?
What is Federation?
What is data cleansing?
Is hadoop still in demand?
Is it possible to rename the output file, and if so, how?
What are the features of Standalone (local) mode?
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