Explain about the basic parameters of mapper and reducer function
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What is the core of the job in MapReduce framework?
when do reducers play their role in a mapreduce task?
It can be possible that a Job has 0 reducers?
What happens when a datanode fails ?
What is a "reducer" in Hadoop?
What does conf.setmapper class do?
How to write MapReduce Programs?
What is the difference between Reducer and Combiner in Hadoop MapReduce?
Is it important for Hadoop MapReduce jobs to be written in Java?
In mapreduce what is a scarce system resource? Explain?
What happens when a DataNode fails during the write process?
What is KeyValueTextInputFormat in Hadoop MapReduce?
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