What Mapper does?
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How can we check whether namenode is working or not?
did you maintain the hadoop cluster in-house or used hadoop in the cloud?
What is hbase in hadoop?
Define a commodity hardware? Does commodity hardware include ram?
Where is the Mapper Output intermediate kay-value data stored ?
Does Hadoop requires RAID?
explain Metadata in Namenode?
How to enable trash/recycle bin in hadoop?
Explain the difference between gen1 and gen2 hadoop with regards to the namenode?
Explain the basic difference between traditional rdbms and hadoop?
Explain use cases where SequenceFile class can be a good fit?
Is it possible to provide multiple inputs to hadoop? If yes, explain.
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