Mention Hadoop core components?
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Mention what is the next step after mapper or maptask?
Is it mandatory to set input and output type/format in MapReduce?
Explain Working of MapReduce?
What is shuffleing in mapreduce?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
what are the basic parameters of a Mapper?
What is the purpose of textinputformat?
What is a Distributed Cache in Hadoop?
What is an identity mapper and identity reducer?
How many Mappers run for a MapReduce job in Hadoop?
How to optimize MapReduce Job?
What is identity mapper and reducer? In which cases can we use them?
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