What is the default replication factor?
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What hadoop does in safe mode?
What is the difference between Apache Hadoop and RDBMS?
What is the Use of SSH in Hadoop ?
What is a Record Reader in hadoop?
Define a job tracker?
What is the heartbeat used for?
Explain the hadoop configuration files at present?
Explain the shuffle?
What is the functionality of jobtracker in hadoop? How many instances of a jobtracker run on hadoop cluster?
Explain the master class and the output class do?
What is the function of ApplicationMaster?
What is salary of hadoop developer?