Explain the Reducer's Sort phase?
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What is an identity mapper and identity reducer?
What is the difference between a MapReduce InputSplit and HDFS block?
When the reducers are are started in a mapreduce job?
How to write a custom partitioner for a Hadoop MapReduce job?
When should you use sequencefileinputformat?
What are mapreduce new and old apis while writing map reduce program?. Explain how it works
what is NameNode in Hadoop?
What is the function of mapreduce partitioner?
what is a sequence file in Hadoop?
What is Counter in MapReduce?
Can we set the number of reducers to zero in MapReduce?
How many Reducers run for a MapReduce job in Hadoop?
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