What is identity mapper and identity reducer?
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How to optimize MapReduce Job?
What is the role of recordreader in hadoop mapreduce?
What combiners is and when you should use a combiner in a MapReduce Job?
What can be optimum value for Reducer?
Explain the general mapreduce algorithm
How does Mappers run method works?
What are the key differences between Pig vs MapReduce?
What do you understand by mapreduce?
How data is spilt in Hadoop?
how Hadoop is different from other data processing tools?
what is NameNode in Hadoop?
how indexing in HDFS is done?
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