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What are mapreduce new and old apis while writing map reduce program?. Explain how it works
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Explain Working of MapReduce?
How can we assure that the values regarding a particular key goes to the same reducer?
What is the difference between RDBMS with Hadoop MapReduce?
What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
what are the most common input formats defined in Hadoop?
Why Mapreduce output written in local disk?
What happens when a DataNode fails during the write process?
Explain the difference between a MapReduce InputSplit and HDFS block?
How does inputsplit in mapreduce determines the record boundaries correctly?
Is it possible to split 100 lines of input as a single split in MapReduce?
Explain how do ‘map’ and ‘reduce’ work?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
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