What is namenode?
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Explain what is hadoop?
Explain the common input formats in hadoop?
How to restart NameNode or all the daemons in Hadoop?
Explain Hadoop streaming?
Ideally what should be the block size in hadoop?
Is Namenode machine same as DataNode machine as in terms of hardware in Hadoop?
Explain what is storage and compute nodes?
What does secondary name-node means?
Can you define udf?
What is TaskTracker?
Explain how can we check whether namenode is working or not?
What is the NameNode port number?
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