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Explain what is “map” and what is "reducer" in hadoop?
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What are the advantages of using map side join in mapreduce?
What is the data storage component used by Hadoop?
Is it necessary to write a mapreduce job in java?
Which Sorting algorithm is used in Hadoop MapReduce?
How to change a number of mappers running on a slave in MapReduce?
What is a partitioner and how the user can control which key will go to which reducer?
what is JobTracker in Hadoop? What are the actions followed by Hadoop?
What is a IdentityMapper and IdentityReducer in MapReduce ?
What is Text Input Format?
What are the various input and output types supported by mapreduce?
How to get the single file as the output from MapReduce Job?
In mapreduce what is a scarce system resource? Explain?
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