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What is an input reader in reference to mapreduce?
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Explain about the basic parameters of mapper and reducer function
What do you mean by data locality?
What is the Reducer used for?
What is the key- value pair in MapReduce?
Is it necessary to write a mapreduce job in java?
What is difference between a MapReduce InputSplit and HDFS block
Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?
How to set the number of mappers for a MapReduce job?
Explain what does the conf.setmapper class do?
What are mapreduce new and old apis while writing map reduce program?. Explain how it works
In MapReduce Data Flow, when Combiner is called?
Explain what is shuffling in mapreduce?
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