what is the default replication factor in HDFS?
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Which are the three main hdfs-site.xml properties?
What is the function of ApplicationMaster?
What is a checkpoint?
What are the main components of a Hadoop Application?
Can the balancer be run while Hadoop is in use?
What are active and passive "NameNodes"?
Explain the master class and the output class do?
What are the problems with Hadoop 1.0?
What is a task instance in hadoop? Where does it run?
Explain what happens in textinformat ?
Explain how do ‘map’ and ‘reduce’ works?
Explain the wordcount implementation via hadoop framework ?