Explain Erasure Coding in Apache Hadoop?
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What is the difference between rdbms and hadoop?
Can Hadoop be compared to NOSQL database like Cassandra?
What is the process to change the files at arbitrary locations in HDFS?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
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In which location Name Node stores its Metadata and why?
How is security achieved in Apache Hadoop?
On what basis Namenode will decide which datanode to write on?
What is IdentityMapper?
What are the main components of a Hadoop Application?
How to come out of the insert mode?
What alternate way does HDFS provides to recover data in case a Namenode
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