What are the most common InputFormats in Hadoop?
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Explain Hadoop streaming?
Explain map-only job?
Explain the core methods of the reducer?
What jobtracker is in hadoop? What are the activities followed by hadoop?
What are the hadoop configuration files at present?
What is Reducer in Hadoop?
Clarify what is sequence file input format?
How will you write a custom partitioner for a Hadoop job?
Why slaves limited to 4000 in hadoop version 1?
What happen on the namenode when a client tries to read a data file?
How NameNode tackle Datanode failures in Hadoop?
What are the port numbers of job tracker?
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