What is Combiner in Hadoop?
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Mention how many inputsplits is made by a hadoop framework?
What is NameNode? How NameNode tackle Datanode failures in Hadoop?
What is the role of the secondary namenode?
Clarify what webdav is in hadoop?
How jobtracker assign tasks to the tasktracker?
Define “speculative execution” in hadoop?
Give me examples of unstructured data?
How ordering in hdfs is finished?
Compare Hadoop 2 and Hadoop 3?
How many daemon processes run on a hadoop cluster?
What does secondary name-node means?
What is the procedure for namenode recovery?
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