What is the difference between TextInputFormat and KeyValueInputFormat class?
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Explain the common input formats in hadoop?
Give me examples of unstructured data?
Why aggregation cannot be done in Mapper?
How to create the directory when name node is in safe mode?
What happen when namenode enters in safemode in hadoop?
Can you explain sequence file in hadoop?
What are the primary phases of the reducer?
Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?
What are the port numbers of task tracker?
What are the features of Fully-Distributed mode?
How Hadoop’s CLASSPATH plays a vital role in starting or stopping in Hadoop daemons?
Is it possible to have hadoop job output in multiple directories?
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