Explain the hadoop configuration files at present?
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Explain the difference between gen1 and gen2 hadoop with regards to the namenode?
On what basis name node distribute blocks across the data nodes?
How to use Apache Zookeeper command line interface?
What is the default replication factor?
What is a spill factor with respect to the ram?
In which location Name Node stores its Metadata and why?
What are the most commonly defined input formats in Hadoop?
What is the purpose of button groups?
On what basis Namenode will decide which datanode to write on?
Which files are used by the startup and shutdown commands?
What are the hadoop's three configuration files?
Name the examples of some companies that are using hadoop structure?
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