What is the purpose of button groups?
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What are active and passive "NameNodes"?
What are sink processors?
What are the different types of Znodes?
What is Hadoop serialization?
What is your favourite tool in the hadoop ecosystem?
How can you connect an application
How many maximum jvm can run on a slave node?
What is the jobtracker and what it performs in a hadoop cluster?
How to configure hadoop to reuse JVM for mappers?
What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?
What is the relation between job and task in hadoop?
How blocks are distributed among all data nodes for a particular chunk of data?