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What do sorting and shuffling do?
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Explain about the partitioning, shuffle and sort phase
What is the difference between Hadoop and RDBMS?
What combiners is and when you should use a combiner in a MapReduce Job?
what daemons run on a master node and slave nodes?
How can you add the arbitrary key-value pairs in your mapper?
What are the four essential parameters of a mapper?
What is MapReduce? What are the syntax you use to run a MapReduce program?
Is it possible to search for files using wildcards?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
What is the difference between Job and Task in MapReduce?
How do ‘map’ and ‘reduce’ work?
Compare RDBMS with Hadoop MapReduce.
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