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Answer Posted / bindu
It takes the output of map task as input and then do reduce work.
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Mention what are the main configuration parameters that user need to specify to run mapreduce job?
What combiners are and when you should utilize a combiner in a map reduce job?
Explain the general mapreduce algorithm
Explain about the partitioning, shuffle and sort phase in MapReduce?
mapper or reducer?
What happen if the number of the reducer is 0 in MapReduce?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
Is it possible to rename the output file?
How to set the number of reducers?
Can MapReduce program be written in any language other than Java?
What counter in Hadoop MapReduce?
What is the data storage component used by Hadoop?
How does inputsplit in mapreduce determines the record boundaries correctly?
How to set mappers and reducers for MapReduce jobs?
What is partitioner and its usage?
