What is Writable & WritableComparable interface?
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What do sorting do?
On what basis Namenode will decide which datanode to write on?
Define a job tracker?
What is the difference between a Hadoop and Relational Database and Nosql?
What is commodity hardware?
How is HDFS fault tolerant?
What is Hadoop serialization?
How does master slave architecture in the hadoop?
What is the sequencefileinputformat in hadoop?
Why password is needed in ssh localhost?
What is IdentityMapper?
What is structured data?
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