Can you tell us how many daemon processes run on a hadoop system?
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What is the difference between Reducer and Combiner in Hadoop MapReduce?
How does Hadoop Classpath plays a vital role in stopping or starting in Hadoop daemons?
What are the data components used by Hadoop?
How can you add the arbitrary key-value pairs in your mapper?
What is reduce side join in mapreduce?
What is identity mapper and reducer? In which cases can we use them?
How can we assure that the values regarding a particular key goes to the same reducer?
Write a short note on the disadvantages of mapreduce
Difference between mapreduce and spark
For a job in Hadoop, is it possible to change the number of mappers to be created?
what are the three modes in which Hadoop can be run?
what are the main configuration parameters that user need to specify to run Mapreduce Job ?