What is IdentityMapper?
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How to enable recycle bin in hadoop?
What problems can be addressed by using Zookeeper?
what is the default replication factor in HDFS?
How to change from su to cloudera?
Where do you specify the Mapper Implementation?
What is the purpose of RawComparator interface?
Are Namenode and job tracker on the same host?
Explain how do ‘map’ and ‘reduce’ works?
What is salary of hadoop developer?
Define a commodity hardware? Does commodity hardware include ram?
How to keep HDFS cluster balanced?
What is a 'block' in HDFS?
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