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When should you use a reducer?
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Define speculative execution?
What is Reduce only jobs?
what are the basic parameters of a Mapper?
what are the most common input formats defined in Hadoop?
For a job in Hadoop, is it possible to change the number of mappers to be created?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
What is the best way to copy files between HDFS clusters?
How can we assure that the values regarding a particular key goes to the same reducer?
Which are the methods in the mapper interface?
What is the default value of map and reduce max attempts?
How to set which framework would be used to run mapreduce program?
Where sorting is done in Hadoop MapReduce Job?
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