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Explain the differences between a combiner and reducer
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Explain about the partitioning, shuffle and sort phase
What is SequenceFileInputFormat?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
What are the four essential parameters of a mapper?
How much space will the split occupy in Mapreduce?
What is sqoop in Hadoop ?
What is shuffling and sorting in Hadoop MapReduce?
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
Is it necessary to write a mapreduce job in java?
How to overwrite an existing output file during execution of mapreduce jobs?
Explain the process of spilling in Hadoop MapReduce?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
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