What is Hadoop serialization?
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What is a “Distributed Cache” in Apache Hadoop?
Explain the difference between NameNode
What is a 'block' in HDFS?
How Mapper is instantiated in a running job?
What are the problems with Hadoop 1.0?
What are the site-specific configuration files in Hadoop?
Does hadoop always require digital data to process?
What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?
What is inputformat in hadoop?
How indexing is done in HDFS?
Explain the features of fully distributed mode?
shouldn't DFS be able to handle large volumes of data already?
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