Explain how do ‘map’ and ‘reduce’ work?
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Compare RDBMS with Hadoop MapReduce.
Describe what happens to a mapreduce job from submission to output?
What is identity mapper and identity reducer?
Write a short note on the disadvantages of mapreduce
how Hadoop is different from other data processing tools?
How many Mappers run for a MapReduce job?
What comes in Hadoop 2.0 and MapReduce V2 YARN
What do you mean by inputformat?
How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?
what are the three modes in which Hadoop can be run?
mapper or reducer?
What is SequenceFileInputFormat?