Input Split & Record Reader and what they do?
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How to enable/configure the compression of map output data in hadoop?
What is the full form of fsck?
What is speculative execution in Hadoop?
What is Rack awareness?
Why is hadoop faster?
What is Hadoop serialization?
What are different types of filesystem?
What do shuffling do?
On what basis name node distribute blocks across the data nodes?
What is a Secondary Namenode? Is it a substitute to the Namenode?
What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?
What should be the ideal replication factor in Hadoop Cluster?
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