Define a metadata?
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What is IdentityMapper?
Should we use RAID in Hadoop or not?
Explain what is the purpose of RecordReader in Hadoop?
Define a metadata?
What is the default block size in hdfs?
How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?
How does a namenode handle the failure of the data nodes?
What is Apache Hadoop YARN?
What is the communication channel between client and namenode/datanode?
Does hadoop always require digital data to process?
what are Task Tracker and Job Tracker?
Name the examples of some companies that are using hadoop structure?
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