What is the procedure for namenode recovery?
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Why we use intwritable instead of int? Why we use longwritable instead of long?
How namenode handles data node failures?
Name the operating system(s) which are supported for production hadoop deployment?
Mention what is the difference between an rdbms and hadoop?
Can you explain sequence file in hadoop?
What is throughput in Hadoop?
Explain what is sequencefileinputformat?
Have you ever used counters in hadoop?
What is Mapper? How can we compress Mapper output in Hadoop?
What sorts of actions does the job tracker process perform?
How jobtracker assign tasks to the tasktracker?
What did mean by data-node?
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