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What is the role of recordreader in hadoop mapreduce?
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what is NameNode in Hadoop?
Which Sorting algorithm is used in Hadoop MapReduce?
When is it suggested to use a combiner in a MapReduce job?
What are the main components of MapReduce Job?
Explain about the partitioning, shuffle and sort phase in MapReduce?
Whether the output of mapper or output of partitioner written on local disk?
What is a distributed cache in mapreduce framework?
what is "map" and what is "reducer" in Hadoop?
What is the difference between a MapReduce InputSplit and HDFS block?
What are the fundamental configurations parameters specified in map reduce?
What are the advantages of using map side join in mapreduce?
Is it important for Hadoop MapReduce jobs to be written in Java?
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