What is the sequencefileinputformat in hadoop?
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What is difference between regular file system and HDFS?
How to enable/configure the compression of map output data in hadoop?
How many JVMs run on a slave node?
Explain the difference between gen1 and gen2 hadoop with regards to the namenode?
What are the two main components of ResourceManager?
What is Rack awareness?
What hadoop does in safe mode?
Command to format the NameNode?
Explain the core components of hadoop?
How can you overwrite the replication factors in HDFS?
What are watches?
Define a combiner?
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