What do you mean by shuffling and sorting in MapReduce?
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What is heartbeat in hdfs? Explain.
What is the function of mapreducer partitioner?
Clarify what is shuffling in map reduce?
What are the identity mapper and reducer in MapReduce?
What is the Job interface in MapReduce framework?
In MapReduce how to change the name of the output file from part-r-00000?
When is the reducers are started in a MapReduce job?
Detail description of the Reducer phases?
What is KeyValueTextInputFormat in Hadoop MapReduce?
How do reducers communicate with each other?
What is shuffleing in mapreduce?
Explain about the basic parameters of mapper and reducer function
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