Can we rename the output file?
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When the reducers are are started in a mapreduce job?
What are ‘reduces’?
What do you mean by shuffling and sorting in MapReduce?
What is the difference between Hadoop and RDBMS?
What is a Speculative Execution in Hadoop MapReduce?
Explain about the partitioning, shuffle and sort phase in MapReduce?
What is the role of recordreader in hadoop mapreduce?
Explain what you understand by speculative execution
Mention what are the main configuration parameters that user need to specify to run mapreduce job?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
Explain how do ‘map’ and ‘reduce’ work?
What are the advantages of using map side join in mapreduce?
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