Is it important for Hadoop MapReduce jobs to be written in Java?
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What are the four essential parameters of a mapper?
How many times combiner is called on a mapper node in Hadoop?
Why can aggregation not be done in Mapper in MapReduce?
What is sqoop in Hadoop ?
How to get the single file as the output from MapReduce Job?
Where sorting is done on mapper node or reducer node in MapReduce?
Explain Working of MapReduce?
What is a partitioner and how the user can control which key will go to which reducer?
What is the difference between Job and Task in MapReduce?
How to set the number of mappers for a MapReduce job?
What is SequenceFileInputFormat?
Explain what is the function of mapreduce partitioner?
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