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Which are the methods in the mapper interface?
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A number of combiners can be changed or not in MapReduce?
How much space will the split occupy in Mapreduce?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
What is the job of blend () and repartition () in Map Reduce?
What are advantages of Spark over MapReduce?
What do you mean by inputformat?
What does conf.setmapper class do?
How to create custom key and custom value in MapReduce Job?
What are the the issues associated with the map and reduce slots based mechanism in mapReduce?
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
What is the relationship between Job and Task in Hadoop?
how can you debug Hadoop code?
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