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How many Reducers run for a MapReduce job in Hadoop?
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Why do we need MapReduce during Pig programming?
In mapreduce what is a scarce system resource? Explain?
Explain combiners.
How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?
What is a IdentityMapper and IdentityReducer in MapReduce ?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
How to sort intermediate output based on values in MapReduce?
Why Mapreduce output written in local disk?
What combiners are and when you should utilize a combiner in a map reduce job?
What is the need of MapReduce?
What are the disservices of utilizing Apache Spark over Hadoop MapReduce?
Write a short note on the disadvantages of mapreduce
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