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What is the need of MapReduce?
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How to get the single file as the output from MapReduce Job?
Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?
It can be possible that a Job has 0 reducers?
How can you add the arbitrary key-value pairs in your mapper?
What is mapreduce algorithm?
How many numbers of reducers run in Map-Reduce Job?
What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
Map reduce jobs take too long. What can be done to improve the performance of the cluster?
When is the reducers are started in a MapReduce job?
Explain what does the conf.setmapper class do?
What are the fundamental configurations parameters specified in map reduce?
What is an input reader in reference to mapreduce?
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