What is InputSplit and RecordReader?
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How would you tackle counting words in several text documents?
What stored in HDFS?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
What alternate way does HDFS provides to recover data in case a Namenode
Define a datanode?
What do shuffling do?
What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?
How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?
explain Metadata in Namenode?
Define streaming?
What do you understand from Node redundancy and is it exist in hadoop cluster?
What happens in a textinputformat?
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