What is Mapper in Hadoop MapReduce?
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How many Mappers run for a MapReduce job in Hadoop?
What is the next step after Mapper or MapTask?
What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
Is it important for Hadoop MapReduce jobs to be written in Java?
What is reduce side join in mapreduce?
Which are the methods in the mapper interface?
What is an input reader in reference to mapreduce?
How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?
What can be optimum value for Reducer?
What are the primary phases of a Reducer?
When Namenode is down what happens to job tracker?
Define speculative execution?
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