What is the role of the namenode?
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What is the number of default partitioner in hadoop?
How namenode handles data node failures?
What are the important features of hadoop?
What is job tracker in Hadoop?
What happens when two clients try to access the same file in the hdfs?
What jobtracker is in hadoop? What are the activities followed by hadoop?
What is Combiner in Hadoop?
Explain the Single point of Failure in Hadoop?
How often do you need to reformat the namenode?
How do you overwrite replication factor?
Ideally what should be replication factor in a Hadoop cluster?
What is purpose of RecordWriter in Hadoop?
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