How many times combiner is called on a mapper node in Hadoop?
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what is "map" and what is "reducer" in Hadoop?
MapReduce Types and Formats and Setting up a Hadoop Cluster?
How data is spilt in Hadoop?
What is the default value of map and reduce max attempts?
What is InputFormat in Hadoop MapReduce?
What happens when a datanode fails ?
Where sorting is done on mapper node or reducer node in MapReduce?
Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?
What are the key differences between Pig vs MapReduce?
Explain what does the conf.setMapper Class do in MapReduce?
What is a map side join?
What is the InputSplit in map reduce ?
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