How many instances of a jobtracker run on hadoop cluster?
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Mention what is the number of default partitioner in Hadoop?
What is the use of Combiner?
Did you ever built a production process in hadoop ? If yes then what was the process when your hadoop job fails due to any reason?
What is the port number for NameNode
What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?
Is hadoop based on google mapreduce?
Can you explain how do ‘map’ and ‘reduce’ work?
Can hive run without hadoop?
What are the limitations of importing RDBMS tables into Hcatalog directly?
Explain the wordcount implementation via hadoop framework ?
Define fault tolerance?
Why do we use Hadoop?
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