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what is NameNode in Hadoop?
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Is it possible to search for files using wildcards?
What do you understand by mapreduce?
Explain what does the conf.setmapper class do?
Can we rename the output file?
What is Hadoop Map Reduce ?
What is MapReduce? What are the syntax you use to run a MapReduce program?
How many times combiner is called on a mapper node in Hadoop?
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If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
What does a 'MapReduce Partitioner' do?
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